#include <bits/stdc++.h>
using namespace std;
using ll = long long;

int main(){
    int N, L;
    ll ans = 0;
    cin >> N >> L;
    vector<bool> tb(L + 1, true);
    for(int i = 2; i <= L && i * (N - 1) <= L; i++){
        if(!tb[i])continue;
        ll l = i * (N - 1);
        ans += L - l + 1;
        for(int j = 2 * i; j <= L; j += i){
            tb[j] = false;
        }
    }
    cout << ans << endl;
}