#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using namespace std;
#define ll long long
#define vl vector<ll>
#define vvl vector<vl>
using mint = modint998244353;

auto _ = []() { ios::sync_with_stdio(false); cin.tie(nullptr); return 0; }();

int main() {
  
  ll N, M; cin >> N >> M;
  
  mint ans = 0;
  
  for (ll i = 1; i <= N; i++) {
    
    for (ll j = 1; j <= M; j++) ans += (mint)i / std::gcd(i, j) * j;
    
  }
  
  cout << ans.val() << "\n";
  
  return 0;
  
}