public class Main {
public static void main(String[] args) {
System.out.println("1000以内的完数如下:");
fun();
}
public static void fun(){
for(int i=1;i<=1000;i++){
int factor=0;
for(int j=1;j<i/2+1;j++){
if(i%j==0)
factor+=j;
}
if(factor==i)
System.out.println(" "+i);
}
}
}