The divisor pairs of 6 are 1 and 6, and 2 and 3. Summing the factors of 6 excluding 6 gets 1+2+3=6, so no matter how many times you apply the function to 6, the answer will always be 6.
The divisor pairs of 6 are 1 and 6, and 2 and 3. Summing the factors of 6 excluding 6 gets 1+2+3=6, so no matter how many times you apply the function to 6, the answer will always be 6.
