#include <iostream>
using namespace std;
int main() {
  int N;
  cin >> N;
  int count = 0;
  for (int i = 2; i <= N; i++) {
    while (i != N) {
      if (N % i != 0)
        break;
      N /= i;
      count++;
    }
  }
  cout << count + 1 << endl;
}