Finding perfect number using for loop

#include<stdio.h>
int main()
{
    int n,sum=0,i;

    printf("enter a value: ");
    scanf("%d", &n);

   for(i=1; i<=n/2 ;i++)
   {
       if(n%i==0)
       {
           sum=sum+i;
       }
   }
   if (sum == n && n>0)
   {
       printf("It is a perfect number");
   }
   else{
    printf("Not a perfect number");
   }

   return 0;
}