Deficient Number

Deficient Number is a number whose sum of proper factors is less than the number itself.

Example 1: 15. Sum of proper factors = 1+3+5 = 9<15. Hence it is a Deficient Number.

Example 2: 18. Sun of proper factors = 1+2+3+6+9 = 21. Hence it is not a Deficient Number.

C
#include <stdio.h>
int main()
{
    int n=0,sum=0;
    printf("Enter a number: ");
    scanf("%d",&n);
    for(int i=1;i<n;i++)
        {
            if(n%i==0)
            {
                sum=sum+i;
            }
        }
        if(sum<n)
        {
            printf("%d is an Deficient Number",n);
        }
        else
        {
            printf("%d is not an Deficient Number",n);
        }
    return 0;
}
C