3rd sample test case is wrong, it should be 504, not 505.

Highly cheesable kata

1. Random tests needed, to prevent predetermined solutions https://www.codewars.com/kata/reviews/5db80ffc2010cb0001879670/groups/5db8194e2010cb000187976a
2. Amicable numbers themselves are very rare. For such small ranges, it is easier to hardcode beginnings of OEIS sequences, which is also a cheese.