#include <iostream>
#include <algorithm>

using namespace std;

using ll = long long;

int main()
{
    ll N, M;
    cin >> N >> M;
    ll er = 0;
    for(ll i = 1; i <= 1000000 && i * i <= M; i++) {
        er += 2 * (M / i - (max(N, i * i) - 1) / i);
        if(N <= i * i)
            er--;
    }
    cout << er << "\n";
}