#include <stdio.h>
#include <stdlib.h>

int sumfactors(int);

int
main(int argc, char **argv) {
    int n, sumfact, i;
    int
    sumfactors(int n) {
    sumfact=0;
    for (i=1; i<=n; i++){
        if (n%i==0){
        sumfact+=i;
        }
    }
    return sumfact;
    }

    printf("Enter number for its factors to be added: ");
    scanf("%d", &n);
    printf("The sum of the factors of %d is %f", n, sumfactors(n));

    return 0;
}