#include<iostream>
using namespace std;

constexpr int NMAX = 1e6 + 1;

long long ans[NMAX];

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr), cout.tie(nullptr);

    int n,m; cin >> n >> m;
    --n,--m; n = min(n,m);

    for(int i = n; i ; i--)
    {
        ans[i] = 1LL * (n / i) * (m / i);
        for(int j = i + i ; j <= n; j += i)
            ans[i] -= ans[j];
    }

    cout << ans[1];

}