题解 | #完全数计算#

import java.util.*;

public class Main{
    public static void main(String[] args){
        Scanner sc = new  Scanner(System.in);
        int n = sc.nextInt();

        int k = 0;
        while(n > 0) {
            int sum = 0;
            for (int i = 1; i < n; i++) {
                if (n % i == 0) {
                    sum += i;
                }
                if (sum > n) {
                    break;
                }
            }
            if (sum == n) {
                k++;
            }
            //
            n--;
        }
        System.out.println(k);
    }


}