Pranto's Problem 2

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

int main() {
    int n;
    printf("Enter the number:\n");
    scanf("%d", &n);
    int sum = 0;
    for (int i = 1; i <= sqrt(n); i++) {
        if (n % i == 0) {
            if (n / i == i) {
                sum += i;
            } else {
                sum += i;
                sum += n / i;
            }
        }
    }
    sum -= n;
    if (sum == n) {
        printf("%d is a perfect number\n", n);
    } else {
        printf("%d is not a perfect number\n", n);
    }
}