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

int main() {
  ll N, K;
  cin >> N >> K;
  ll t = N - K;
  ll ans = 0;
  for(ll i = 1; i * i <= t; i++) {
    if(t % i == 0) {
      if(i > K) ans++;
      if(i != t / i and t / i > K) ans++;
    }
  }
  cout << ans << endl;
}