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);
        while (sc.hasNext()) {
            int number = sc.nextInt();
            // 统计完全因子的个数
            int count = 0;
            while (number > 2) {
                int sum = 1;
                for (int i = 2; i < number / 2 + 1; i++) {
                    if (number % i == 0) {
                        sum += i;
                    }
                }
                if (sum == number) {
                    count++;
                }
                number--;
            }
            System.out.println(count);
        }
    }
}