16)Write a C program to check whether given number is perfect or not.
#include <stdio.h>
int main()
{
int i, num, sum = 0;
/* Input a number from user */
printf("Enter any number to check perfect number: ");
scanf("%d", &num);
/* Calculate sum of all proper divisors */
for(i=1; i
{
/* If i is a divisor of num */
if(num%i == 0)
{
sum += i;
}
}
/* Check whether the sum of proper divisors is equal to num */
if(sum == num)
{
printf("%d is PERFECT NUMBER", num);
}
else
{
printf("%d is NOT PERFECT NUMBER", num);
}
return 0;
}
/
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