public static int[] whatAreProperDivisorsOf(int x) {
        //array to store the values
        int[] temp = new int[x];
        int index = 0;

        for (int i = 1; i < x; i++) {
            if (x % i == 0) {
                temp[index] = i;  //-1 as starting at one but index 0
                index++;
                System.out.println("x: " + x + " i: " + i);
//                for (int j = 0; j < temp.length; j++) {
                System.out.println(temp[index]);
            }
        }
        return temp;
    }