#include <stdio.h>

int main() {
    int x;
    while(scanf("%d", &x) != EOF) {
        int res = 0;
        for(int i = 2; i < x / i; i++) {
            while(x % i == 0) {
                res++;
                x /= i;
            }
        }
        if(x > 1) res++;	//最多有一个质因数大于根号x
        printf("%d\n", res);
    }

    return 0;
}