#include<bits/stdc++.h>

using namespace std;


int main() {
    long long number;
    cin >> number;
    long long n = number;
    int k = 0;
    for (int i = 2; i * i <= n; i++) {
        if (number % i == 0){
            while(number % i == 0){
                number /= i;
            }
            k++;
        }
    }
    if (number != 1){
        k++;
    }
    cout << k << endl;
    return 0;
}