#include <bits/stdc++.h>
using namespace std;
int main(void){
    int n,m;
    cin>>n>>m;
    long long ans=0;
    for(long long i=1;i<=n;i++)for(long long j=1;j<=m;j++)ans=(ans+i*j/gcd(i,j))%998244353;
    cout<<ans<<endl;
    return 0;
}