#include<bits/stdc++.h>
using namespace std;
#define int long long
int n, m, f[1000010], ans;
signed main() {
	freopen("energy2010.in", "r", stdin);
	freopen("energy2010.out", "w", stdout);
	cin >> n >> m;
	if(n > m) {
		swap(n, m);
	}
	for(int i = n; i >= 1; i --) {
		f[i] = (n / i) * (m / i);
        for(int j = i << 1; j <= n; j += i) {
        	f[i] -= f[j];
        }
        ans += ((i << 1) - 1) * f[i];
	}
	cout << ans;
	return 0;
}