#include <bits/stdc++.h>
#define ll long long
#define REP(i, n) for(int i=0;i<n;i++)

using namespace std;

ll n;

int main(){
    ll N, M;
    cin >> N >> M;

    ll res = 0;
    ll j;
    for(j = 1; j*j < M; j++) {
        ll NN = max(N, j*j);
        ll mn = (NN-1)/j;
        ll mx = M/j;
        res += (mx - mn)*2;
        if(NN == j*j) res -= 1;
    }

    cout << res << endl;
}