Pseudoperfect Numbers

By: DeAnna Schlebach

Sierpinski named these numbers

Sometimes called semiperfect numbers

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!

Wolfram Math:

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