#include<iostream>

using namespace std;

long long l, r;
long long ans;


int main()
{
	cin>>l>>r;
	long long o = 0;
	while(o*o < l)
		o++;
	for(long long i = 1; i*i <= r; i++)
	{
		ans += 2*(r/i-max(i-1, (l-1)/i));
		if(i*i >= l)
			ans--;
	}
	cout<<ans<<endl;
	return 0;
}