#include <bits/stdc++.h>
using namespace std;
#include <atcoder/all>
using namespace atcoder;

using ll = int64_t;
using ul = uint64_t;
using ld = long double;
using vi = vector<int>;
using vd = vector<double>;
using vc = vector<char>;
using vs = vector<string>;
using vb = vector<bool>;
using vl = vector<ll>;
using vvi = vector<vi>;
using vvd = vector<vd>;
using vvc = vector<vc>;
using vvb = vector<vb>;
using vvl = vector<vl>;
using mint = modint998244353;
using vm = vector<mint>;

ll GCD(ll A, ll B) {
	if (A%B == 0) return B;
	else return GCD(B, A%B);
}

int main() {
  ll N,M;
	cin >> N >> M;
	ll ans = 0,mod = 998244353;
	for (ll a = 1; a <= N; a++) {
		for (ll b = 1; b <= M; b++) {
			ans += a*b/GCD(a, b)%mod;
			ans %= mod;
		}
	}
	cout << ans << endl;
  return 0;
}