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

typedef long long ll;
typedef pair<int, int> ii;
typedef vector<int> vi;
typedef vector<ii> vii;
const int inf=0x3f3f3f3f;

#define FOR(i,b,e) for(int i=b; i<=e; i++)
#define FORD(i,b,e) for(int i=b; i>=e; i--)
#define SIZE(x) ((int)x.size())
#define pb push_back
#define st first
#define nd second
#define sp ' '
#define ent '\n'

const int N=1e6+5;

ll licz(ll val, ll kon){
	return kon/val;
}

ll siup(ll val, ll kon){
	ll pier, ost;
	pier=val*(N+1);
	ost=kon-kon%val;
	if(pier>ost) return 0;
	return (ost-pier)/val+1;
}

ll f(ll kon){
	if(kon<1) return 0;
	ll ret=0;
	FOR(i, 1, N) ret+=licz(i, kon);
	if(kon>N) FOR(i, 1, N) ret+=siup(i, kon);
	return ret;
}

void solve(){
	ll l, r;
	cin>>l>>r;
	cout<<f(r)-f(l-1)<<ent;
}

int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	solve();
	return 0;
}