#include<bits/stdc++.h>
#define int long long
using namespace std;
int n,k;
int x,y,z;
int ans=0;
signed main()
{
	cin>>n>>k;
	x=1;
	while(x<=n)
	{
		y=k/x;
		if(y==0)
			break;
		z=k/y;
		z=min(z,n);
	//	cout<<x<<":"<<y<<":"<<z<<endl;
		ans+=((y*(z+x)*(z-x+1))/2);
	//	cout<<":"<<ans<<endl;
		x=z+1;
	}
	ans=n*k-ans;
	cout<<ans<<endl;
	return 0;
}