program:
#include<stdio.h>
#include<math.h>
main()
{
int num,i,sum=0;
printf("Enter a number to know whether it is perfect or not\n");
scanf("%d",#);
for(i=1;i<num;i++)
{
if(num%i==0)
{
sum+=i;
}
}
if(sum==num)
{
printf("The given number %d is perfect\n",num);
}
else
{
printf("The given number %d is not perfect because the sum of its divisors are %d\n",num,sum);
}
}
output: