Check whether the given number is Perfect Number or not. 




#include<stdio.h>
#include<math.h>

void main() {
int i;
int number;
int sum = 1;

 printf("Enter number: ");
scanf("%d", &number);

 for(i = 2; i <= sqrt(number); i++) {
if(number % i == 0) {

 if(number/i == i)
sum += i;
else
sum = sum + i + (number/i);
}
}

 if(sum == number) 
printf("%d is perfect number", number);
else
printf("%d is not perfect number", number);

}