#pragma region header // #pragma GCC target("avx2") #pragma GCC optimize("O3") #pragma GCC optimize("unroll-loops") #include // #include using namespace std; #define all(x) (x).begin(), (x).end() #define isIn(x, y, h, w) ((x) >= 0 && (x) < (h) && (y) >= 0 && (y) < (w)) #define rep(i, n) for(int i = 0; i < (int)(n); i++) #define rrep(i, n) for(auto i = (n) - 1; i >= 0; i--) #define repi(i, n1, n2) for(auto i = (n1); i < (n2); i++) #define rrepi(i, n1, n2) for(auto i = (n2) - 1; i >= (n1); i--) #define rep2(i, j, n) rep(i, n) repi(j, i + 1, n) #define DFS(...) self(self, __VA_ARGS__) #define min_equal(v, x) lower_bound(all(v), (x)) - (v).begin() #define min_over(v, x) upper_bound(all(v), (x)) - (v).begin() #define max_equal(v, x) upper_bound(all(v), (x)) - (v).begin() - 1 #define max_under(v, x) lower_bound(all(v), (x)) - (v).begin() - 1 template static inline vector makevec(const T &n, const U &u){ return vector(n, u); } template static inline auto makevec(const T &n, const Args&... args){ return vector(n, makevec(args...)); } #define in(T, ...) T __VA_ARGS__; input(__VA_ARGS__) #define inrows(n, ...) rep(inrows_, n) inrow(__VA_ARGS__) #define invec(T, n, ...) vector __VA_ARGS__; inputvec(n, __VA_ARGS__); #define invec2(T, n, m, x) vector> x(n, vector(m)); input(x) template inline void input(T&... x){ (cin >> ... >> x); } template inline void inputvec(const T &n){ (void)n; } template inline void inputvec(const T &n, Head &v, Tail&... tail){ v.resize(n); cin >> v; inputvec(n, tail...); } inline void inrow(){} template inline void inrow(Head &x, Tail&... tail){ in(typename Head::value_type, y); x.push_back(y); inrow(tail...); } template istream &operator>>(istream &is, vector &x){ for(auto &&v : x) is >> v; return is; } #define INT(...) in(int, __VA_ARGS__) #define STR(...) in(string, __VA_ARGS__) #define CHAR(...) in(char, __VA_ARGS__) #define VI(n, ...) invec(int, (n), __VA_ARGS__) #define VS(n, ...) invec(string, (n), __VA_ARGS__) #ifdef DEBUG #define dbg(...) cout << #__VA_ARGS__ << ": "; print(__VA_ARGS__); cout << flush #else #define dbg(...) (static_cast(0)) #endif const string DELIMITER[] = #ifdef DEBUG {",", "(", ")", "[", "]"}; #else {" ", "", "", "", ""}; #endif ostream &operator<<(ostream &os, __int128_t x){ if(x < 0) x *= -1, os << '-'; vector v; while(x) v.push_back(x % 10), x /= 10; if(!v.size()) return os << 0; for(int i = (int)v.size() - 1; i >= 0; i--) os << v[i]; return os; } // template ostream &operator<<(ostream &os, const atcoder::static_modint &x){ return os << x.val(); } // template ostream &operator<<(ostream &os, const atcoder::dynamic_modint &x){ return os << x.val(); } template ostream &operator<<(ostream &os, const pair &p){ return os << DELIMITER[1] << p.first << DELIMITER[0] << p.second << DELIMITER[2]; } template && !is_same_v, nullptr_t> = nullptr> ostream &operator<<(ostream &os, const T &c){ for(auto it = c.begin(); it != c.end(); it++) os << DELIMITER[(it == c.begin()) ? 3 : 0] << *it; return os << DELIMITER[4]; } template inline void prend(const T &a){ cout << a << '\n'; exit(0); } template inline void print(const T &a){ cout << a << '\n'; } template inline void print(const Head &a, const Tail&... b){ cout << a << ' '; print(b...); } inline void prec(const int d){ cout << fixed << setprecision(d); } const vector> YN_string = {{"Yes", "No"}, {"YES", "NO"}, {"Takahashi", "Aoki"}, {"Alice", "Bob"}, {"Possible", "Impossible"}}; enum class YesNo{ Yes, YES, taka, alice, poss }; inline void i0(){} template, nullptr_t> = nullptr, class... Tail> inline void i0(T &x, Tail&... tail){ x--; i0(tail...); } template inline void i0(vector &v, Tail&... tail){ for(auto &&x : v) i0(x); i0(tail...); } template inline T div_floor(T a, T b){ if(b < 0) a = -a, b = -b; return a >= 0 ? a / b : (a + 1) / b - 1; } template inline T div_ceil(T a, T b){ if(b < 0) a = -a, b = -b; return a <= 0 ? a / b : (a - 1) / b + 1; } template inline T div_less(T a, T b){ return div_floor(a, b) - !(a % b); } template inline T div_greater(T a, T b){ return div_ceil(a, b) + !(a % b); } template inline void sort(vector &v){ sort(v.begin(), v.end()); } template inline void rsort(vector &v){ sort(v.rbegin(), v.rend()); } template inline void unique(vector &v){ sort(v); v.erase(unique(v.begin(), v.end()), v.end()); } template inline auto min(const T &a){ return *min_element(a.begin(), a.end()); } template inline auto max(const T &a){ return *max_element(a.begin(), a.end()); } template inline bool chmin(T &a, const T &b){ return a > b ? a = b, true : false; } template inline bool chmax(T &a, const T &b){ return a < b ? a = b, true : false; } template inline typename T::value_type mex(const T &st){ for(auto i = typename T::value_type(0); ; i++) if(!st.count(i)) return i; } template inline T calc_sum(const vector &v){ return accumulate(v.begin(), v.end(), T(0)); } using ld = long double; using ll = long long; using l128 = __int128; template using P = pair; template using tup3 = tuple; template using heap = priority_queue, greater>; template using vec2 = vector>; template using vec3 = vector>; template using uset = unordered_set; template using umap = unordered_map; struct FastIO{ FastIO(){ cin.tie(0); cout.tie(0); ios::sync_with_stdio(0); prec(10); } } fastio__; #include #include template using tree = __gnu_pbds::tree, __gnu_pbds::rb_tree_tag, __gnu_pbds::tree_order_statistics_node_update>; #pragma endregion header #define int long long const int inf = 2e9; const int INF = 2e18; const double EPS = 1e-8; const int MOD = 998244353; using pi = pair; using ipi = pair>; using pii = pair, int>; using vi = vector; using vpi = vector; using vs = vector; using vd = vector; using vvi = vector>; // using mint = atcoder::modint1000000007; // using mint = atcoder::modint998244353; // using mint = atcoder::modint; // using vm = vector; const int dx[] = {0, 1, 0, -1, 1, 1, -1, -1}; const int dy[] = {1, 0, -1, 0, 1, -1, -1, 1}; #define YN YesNo::Yes inline void Yes(bool end = false){ print(YN_string[(int)YN][0]); if(end) exit(0); } inline void No(bool end = false){ print(YN_string[(int)YN][1]); if(end) exit(0); } inline void isYes(bool x, bool end = false){ print(YN_string[(int)YN][!x]); if(end) exit(0); } template struct modint{ long long a; modint() : a(0){} modint(long long t){ a = t % mod; if(a < 0) a += mod; } operator long long() const{ return a; } bool operator==(const modint &x) const{ return a == x.a; } bool operator!=(const modint &x) const{ return a != x.a; } modint operator-() const{ return modint(a ? (mod - a) : 0); } modint operator~() const{ return pow(mod - 2); } modint inv() const{ return pow(mod - 2); } modint operator+(const modint &x) const{ return modint(*this) += x; } modint operator-(const modint &x) const{ return modint(*this) -= x; } modint operator*(const modint &x) const{ return modint(*this) *= x; } modint operator/(const modint &x) const{ return modint(*this) /= x; } modint &operator+=(const modint &x){ a += x.a; if(a >= mod) a -= mod; return *this; } modint &operator-=(const modint &x){ a -= x.a; if(a < 0) a += mod; return *this; } modint &operator*=(const modint &x){ a = a * x.a % mod; return *this; } modint &operator/=(const modint &x){ a = a * (~x).a % mod; return *this; } friend ostream &operator<<(ostream &os,const modint &x){ return os << x.a; } friend istream &operator>>(istream &is,modint &x){ long long t; is >> t; x = modint(t); return is; } modint pow(long long x) const{ modint ret = 1,tmp = a; for(;x;tmp *= tmp,x >>= 1){ if(x & 1) ret *= tmp; } return ret; } }; using mint = modint<>; vector>> factorization_table(const int n){ vector>> ret(n + 1); for(int i = 2; i <= n; i++){ if(ret[i].size()) continue; for(int j = i; j <= n; j += i) ret[j].emplace_back(i, 1); int ipow = i * i; while(ipow <= n){ for(int j = ipow; j <= n; j += ipow) ret[j].back().second++; ipow *= i; } } return ret; } signed main(){ INT(n, k); auto ft = factorization_table(n); auto fact = ft[n]; while(k && (fact.size() >= 2 || fact[0].first >= 3)){ umap f; for(const auto &[p, cnt] : fact){ for(const auto &[np, ncnt] : ft[p + 1]){ f[np] += ncnt * cnt; } } vpi nxt; for(const auto &[p, cnt] : f) nxt.emplace_back(p, cnt); swap(nxt, fact); dbg(fact); k--; } if(!k){ mint ans = 1; for(const auto &[p, cnt] : fact) ans *= mint(p).pow(cnt); print(ans); }else print(mint(2 + k % 2).pow(mint(2).pow(k / 2 * fact[0].second))); }