2155.质因数个数

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        long n = scan.nextLong();
        long ans = 0;
        for (long i = 2; i * i <= n; i++) {
        	if(n % i == 0) {
        		ans++;
        		while(n % i == 0) n /= i;
        	}
        }
        
        if (n > 1) ans++;
        System.out.println(ans);
        scan.close();
    }
}