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

int* sigma(int n);

int main() {
  int* p = sigma(52);
  if (p) {
    for (int i=0; i<sizeof(p)/sizeof(p[0]); i++) {
      printf("%d\n", p[i]);
    }
    free(p);
  }
  return 0;
}

int* sigma(int n) {
  int factorsTemp[n/2];

  int position = 0;
  for (int i=1; i<=n/2; i++) {
    if (n%i==0) {
      factorsTemp[position] = i;
      position++;
    }
  }
  printf("pos: %d\n", position);

  int* factors;
  factors = (int *) malloc(sizeof(int)*position);

  if (!factors) {
    return NULL;
  }

  printf("size: %lu\n", sizeof(factors));
  for (int i=0; i<sizeof(factors)/sizeof(factors[0]); i++) {
    printf("%d\n", i);
    factors[i] = factorsTemp[i];
  }

  return 0;
}