#include <bits/stdc++.h>

using namespace std;

#define FOR(a, b, c) for(int a = (b); a < (c); a++)

using ll = long long;
#define LL long long

int main() {
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    ll n, m;
    cin >> n >> m;
    ll res = 2 * (m - n + 1);
    
    ll sm = ceil(sqrt(m));

    // cerr << sm << "\n";

    for(ll k = 2; k * k <= m; k++) {
        ll l = (n + k - 1) / k;
        ll r = m / k;

        if(l <= 1 and 1 <= r) {
            res--;
        }

        // if(k * k <= m and k * k >= n) {
        //     res--;
        // }
        
        res += max(0ll, r - max(l, sm) + 1);

        res += (r - l + 1);
        // cerr << k << " : " << l << ", " << r << "\n";
    }

    cout << res << "\n";
}