import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); int n = sc.nextInt(); int sum = 0; for(int i = 1; i <= n; i++){ if(n % i ==0){ sum += i; } } System.out.println(sum); } }这是便利所有数字一直到n,能被n整除的就用sum加,最后输出sum。