#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <utility>
#include <map>
#include <set>
#include <queue>
#include <iomanip>
#include <cmath>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
typedef long long ll;
#define rep(i,n) for (int i = 0; i < int(n);i++)


int main(){
	ll n,k;
	cin >> n >> k;
	n -= k;
	ll ans = 0;
	for (ll i = 1LL; i*i <= n;i++){
		if (n%i == 0){
			ans+=2;
		}
		if (i*i == n) ans--;
	}
	if (k != 0){
		cout << ans-1 << endl;
	}
	else{
		cout << ans << endl;
	}

	
	return 0;
}