#include <stdio.h>

int main() {
    int n;
    while (scanf("%d", &n) != EOF) {
        int count=0;
        while(n!=1){
            for(int i=2;i<=n;){
                if(n%i==0) {
                    n /= i;
                    count++;
                    continue;
                }
                else i++;
            }
        }
        printf("%d\n",count);
    }
    return 0;
}