#include <fstream>
using namespace std;
ifstream cin("mins.in");
ofstream cout("mins.out");
long long n , m , v[1000001];
int main()
{
    cin >> n >> m;

    n--; m--;
    int mn = min(n,m);

    for(int i = mn ; i >= 1 ; --i)
    {
        v[i] = (n/i) * (m/i);
        for(int j = i+i ; j <= mn ; j += i)
            v[i] -= v[j];
    }
    cout << v[1];
    return 0;
}