#include <bits/stdc++.h>

using namespace std;
typedef long double ld;
typedef long long ll;
typedef pair<int,int> ii;
typedef pair<double,double> dd;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<vector<int>> vvi;
typedef vector<ii> vii;

int main(){
    long long m, n, cnt;
    cnt = 0;
    cin >> n >> m;
    ll n1, n2, m1, m2;
    n1 = n;
    m2 = m;
    if(n > 1000000) {
        n2 = n;
        m2 = m;
        n1 = 1; m1 = 0;
    } else if (m <= 1000000) {
        n1 = n; m1 = m;
        n2 = 1; m2 = 0;
    } else {
        n1 = n; m1 = 1000000;
        n2 = 1000001; m2 = m;
    }
    for(ll i=1; i<=1000000; i++)
    {
        cnt += (m1/i-(n1-1)/i);
        cnt += 2*(m2/i-(n2-1)/i);
        if(i*i >= n2 && i*i <= m2)
            cnt--;
        // cout << i<< " " << cnt << endl;
    }
    cout << cnt << endl;
}