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

ll f(ll m) {
if(m==0) return 0;
ll res = 0;
ll i = 1;
while(i*i<m) {
	res += 2ll*((m/i) -i)+1ll;
	i++;
}
if(i*i==m) res++;
return res;
}

int main(){
	ios_base::sync_with_stdio(0);
	cout.tie(0);
	cin.tie(0);

	ll n, m; cin>>n>>m;
	cout<<f(m)-f(n-1) <<"\n";

	return 0;
}