#include <bits/stdc++.h>

using namespace std;

template <typename T>
vector<T> divisor(T n){
    T rt = sqrt(n);
    vector<T> res, resB;
    for(T i = 1; i * i <= n; i++){
        if(n % i == 0){
            res.push_back(i);
            T j = n / i;
            if(j != rt){
                resB.push_back(j);
            }
        }
    }
    for(int i = (int) resB.size() - 1; i >= 0; i--){
        res.push_back(resB[i]);
    }
    return res;
}

int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    long long n, k; cin >> n >> k;
    long long m = n - k;
    int ans = 0;
    vector<long long> div = divisor(m);
    for(auto &x : div){
        if(x > k) ans++;
    }
    cout << ans << endl;
}