#include <bits/stdc++.h>
#define ll long long

using namespace std;

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

const int NMAX = 1e6;

int n, m;
ll answer;
ll dp[NMAX + 1];

signed main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    fin >> n >> m;
    n--; m--;
    int mini = min(n, m);
    for(int i = mini; i >= 1; i--) {
        int good_n = n / i;
        int good_m = m / i;
        dp[i] = (ll) good_n * good_m;
        for(int j = i + i; j <= mini; j += i) {
            dp[i] -= dp[j];
        }
    }
    fout << dp[1];
    return 0;
}