GIVEN NUMBER IS PERFECT NUMBER OR NOT

/* THE GIVEN NUMBER IS PERFECT NUMBER OR NOT */

#include<stdio.h>
#include<conio.h>

void main()
{
  int n,i=1,sum=0;
  clrscr();
  printf("Enter a number: ");
  scanf("%d",&n);
  while(i<n)
{
      if(n%i==0)
     {
           sum=sum+i;
     }
          i++;
  }
  if(sum==n)
      printf("%d is a perfect number",i);
  else
      printf("%d is not a perfect number",i);
getch();
}

EXAMPLES:
For example 6 is perfect number since divisor of 6 are 1, 2 and 3.  Sum of its divisor is
1 + 2+ 3 =6
Next perfect number is 28 since 1+ 2 + 4 + 7 + 14 = 28
Some more perfect numbers: 496, 8128