#include<bits/stdc++.h>
#define rep(i, n) for (int i=0;i<n;++i)
using namespace std;
using ll = long long;
int main() {
	ll n,k; cin>>n>>k;
	ll a=n-k;
	ll b=0;
	for(ll i=1;i*i<=a;++i) {
		if(a%i) continue;
		if(k<i)++b;
		if(i*i!=a&&k<a/i)++b;
	}
	cout<<b<<endl;
}