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

typedef long long ll;
typedef pair<int, int> pii;

int main() {
    
    ll n, m;
    cin >> n >> m;
    
    ll result = 0;
    for (ll i = 1; i * i <= m; i++) {
        ll low = max(i * i, n);
        result += (m / i - (low - 1) / i) * 2;
        if (i * i >= low && i * i <= m) result--;
    }
    cout << result << endl;
    return 0;
}