Pseudoperfect Numbers
By: DeAnna Schlebach
Definition: the sum of some (or all) of its proper divisors
First Few Numbers of Sequence...
6, 12, 18, 20, 24, 28, 30, 36, 40, ...
Numbers Close to This Definition
Perfect Numbers- Sum of ALL the proper divisors of a number.
Euclid and the Greeks studied this!