#include <cassert>
#include <cmath>
#include <algorithm>
#include <iostream>
#include <iomanip>
#include <climits>
#include <map>
#include <queue>
#include <set>
#include <cstring>
#include <vector>

using namespace std;
typedef long long ll;

bool checked[10000010];

int main() {
  ll N, L;
  cin >> N >> L;
  memset(checked, false, sizeof(checked));

  ll ans = 0;

  for (ll l = 2; l <= L; ++l) {
    if (checked[l]) continue;

    for (ll x = l; x <= L; x += l) {
      checked[x] = true;
    }

    ll a = L - l * (N - 1) + 1;
    if (a <= 0) break;

    ans += a;
  }

  cout << ans << endl;

  return 0;
}