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

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);
        }
    }
    sort(ret.begin(), ret.end()); // 昇順に並べる
    return ret;
}

int main(){
	
	long long  n, k;
	cin >> n >> k;

	n -= k;

	vector<long long > a = divisor(n);
	
	long long  res = a.size();

	for(auto x : a){
		if(x < k) res --;
		else if(x == 1 && k != 0) res--;
	}
	
	cout << res << endl;	

}