package yukicoder;

import java.util.Scanner;

public class No537 {
    public static void main(String[] args) {
        long n = new Scanner(System.in).nextLong();
        long rootN = (long)Math.pow(n, 0.5);
        int cnt = 0;

        for(int i = 1; i <= rootN; i++) {
            if(n % i == 0) cnt++;
        }

        System.out.println(2 * cnt);
    }
}