#include #include #include using namespace std; typedef long long ll; bool is_square(ll x, ll& y) { ll ok = 2000000, ng = 0; while (ok - ng > 1) { ll mid = (ok + ng) / 2; if (mid * mid >= x) ok = mid; else ng = mid; } y = ok; return ok * ok == x; } ll solve(ll a, ll b, ll c) { if (4 * a * c > b * b) return 1145141919810893; ll ret; if (!is_square(b * b - 4 * a * c, ret)) return 1145141919810893; ll bunshi = -b + ret; if (bunshi < 0) return 1145141919810893; if (bunshi % (2 * a) != 0) return 1145141919810893; return bunshi / (2 * a); } int main() { ll N; cin >> N; vector yakusu; for (ll i = 1; i <= N; i++) { if ((N * N) % i == 0)yakusu.push_back(i); } ll ans = 0; for (int i = 0; i < yakusu.size(); i++) { for(int j = 0; j <= i; j++){ ll x = yakusu[i], y = yakusu[j]; //N^2=x*y*z*(x+y+z)となる(x, y, z)を求める。 //ここでは、zの解があるか、そしてx >= y >= zなのかをたしかめる。 //overflow防止のために、x*yで両辺を割る。 if ((N * N) % (x * y) != 0)continue; if (solve(1, x + y, -N * N / (x * y)) <= y) { ans++; } } } cout << ans << endl; return 0; }