The "proper factors" of integer n are all the factors of n that are less than n. So, the factors of 10 are 1, 2, 5, and 10, but the proper factors of 10 are just 1, 2, and 5. A number n is "abundant" if its proper factors add up to more than n. n is "deficient" if its proper factors add up to less than n. n is "perfect" if its proper factors add up to exactly n. Given a positive integer, return whether the number is abundant, deficient, or perfect.