#include <fstream>

using namespace std;

const int Nmax = 1000005;

int cnt[Nmax]; 

int main() {
    int n, m;
    ifstream fin("mins.in");
    ofstream fout("mins.out");
    fin >> n >> m;
    n--; m--;
    long long nr = 0;
    for(int i = 2; i <= min(n, m); i++) {
        // cnt[i] = de cate ori am adunat (Mi, Mi) la 'solutie'
        int x = cnt[i] - 1;
        if(x == 0) {
            continue;
        }
        nr -= 1LL * x * (n / i) * (m / i);
        for(int j = i; j <= min(n, m); j += i) {
            cnt[j] -= x;
        }
    }
    fout << 1LL * n * m - nr;
    return 0;
}