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

vector<long long> divisor(long long n) {
    vector<long long> ret;
    for (long long i = 1; i * i <= n; i++) {
        if (n % i == 0) {
        	ret.push_back(i);
            if(i * i != n) ret.push_back(n / i);
        }
    }
    return ret;
}

int main(){
	ll N,K; cin >> N >> K;
	vector<ll> v = divisor(N-K);
	sort(v.begin(),v.end());
	cout << v.end() - upper_bound(v.begin(),v.end(),K) << endl;
}