#include<stdio.h>
int main()
{
    int a,b,s;
    printf("请输入一个数：");
    scanf("%d",&a);
    for(b=1,s=0;b<a;b++)
    {   
        if(a%b==0)
        s=s+b;
        if(a==s)
            printf("是完数\n");
        else
            printf("不是完数\n");
}

    return 0;
}