#include<stdio.h>
int main(){
    int n=6,r,sum=0;
    int temp=n;
   int i;
   for(i=1;i<n;i++){
       if(n%i==0){
           sum=sum+i;
       }
   }
   if(temp=sum){
        printf("It is Perfect number");
    }
    else{
        printf("It is not  Perfect number ");
    }
}