equation.cpp

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

typedef long long ll;

signed main() {
  cin.tie(0)->sync_with_stdio(0);
  int n; cin >> n;
  int ans = 0;
  for (int i = 1; i * i <= n + 1; i++) {
    if ((n + 1) % i == 0) {
      ans++;
      if ((n + 1) / i != i) ans++;
    }
  }
  cout << ans << '\n';
}