#include <iostream>
#include <fstream>

using namespace std;

ifstream fin("mins.in");
ofstream fout("mins.out");


#define MAXN 1000005

int v[MAXN];
int main()
{
    int c, d, i, j;

    fin >> c >> d;

    long long sol = 0, x;

    i = 2;
    while(i <= min(c - 1, d - 1))
    {
         x = 1 - v[i];

         sol += (long long)(x * ((c - 1)/ i) * ((d - 1) / i));
         for(j = 2 * i; j <= min(c - 1, d - 1); j += i)
            v[j] += x;

        i++;
    }

    fout << (long long)((c - 1) * (d - 1) - sol);


    return 0;
}