Category:Abundancy

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This category contains results about Abundancy.
Definitions specific to this category can be found in Definitions/Abundancy.


Let $n$ be a positive integer.

Let $\map \sigma n$ be the sigma function of $n$.

That is, let $\map \sigma n$ be the sum of all positive divisors of $n$.

Then the abundancy index of $n$ is defined as $\dfrac {\map \sigma n} n$.

Subcategories

This category has the following 14 subcategories, out of 14 total.

A

D

H

M

P

Q

S

T