#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  int cnt = 0;
  for (int i = 1; i <= n / 2; i++) {
    int ex = n - i;
    if (ex % i == 0) cnt++;
  }
  cout << cnt << endl;
  return 0;
}
