#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
  #define _GLIBCXX_DEBUG
#else
  #define Debug(...) void(0)
#endif
using ll = long long;
#define rep(i, n) for (int i = 0; i < (n); ++i)

int main() {
  ll n, k;
  cin >> n >> k;
  ll y = n - k;
  set<ll> div;
  for (ll x = 1; x * x <= n; x++) {
    if (y % x == 0) {
      div.insert(x);
      div.insert(y / x);
    }
  }
  if (k != 0) div.erase(1);
  cout << div.size() << endl;
  return 0;
}