#include <bits/stdc++.h>
using namespace std;
ifstream f("mins.in");
ofstream g("mins.out");
long long n, m, cnt, nr[1000005];
int main()
{
    f >> n >> m;
    for(long long i = 2; i <= min(n, m); i ++)
    {
        cnt -= (nr[i] - 1) * ((n - 1) / i) * ((m - 1) / i);
        for(long long j = i; j <= min(n, m); j += i)
            nr[j] -= (nr[i] - 1);
    }

    g << (n - 1) * (m - 1) - cnt;
    return 0;
}