#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint1000000007;//998244353;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf 1000000001

mint get(long long x){
	mint ret = x;
	ret *= x-1;
	ret *= x-2;
	ret /=6 ;
	return ret;
}

int main(){
	
	long long n,m;
	cin>>n>>m;
	
	mint ans = get(n*m);
	
	ans -= get(n)*m;
	ans -= get(m)*n;
	
	vector<mint> cur(200005,0);
	
	for(int i=2;i<=200000;i++){
		
		mint x = 0;
		for(int j=i;j<n;j+=i){
			x += n - j;
		}
		mint y = 0;
		for(int j=i;j<m;j+=i){
			y +=  m - j;
		}
		cur[i] += i-1;
		for(int j=i*2;j<cur.size();j+= i)cur[j] -= cur[i];
		ans -= x*y*2*(cur[i]);
		
		
	}
	
//	rep(i,7)cout<<cur[i].val()<<endl;
	
	cout<<ans.val()<<endl;
	
	return 0;
}