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Divisor_square.svg‎ (SVG file, nominally 600 × 480 pixels, file size: 8 KB)

[edit] Summary

σ₂(n) =	∑	d²
	d \| n

in the range of $1\le n \le 250$

[edit] Licensing

Created by Linas Vepstas User:Linas on 12 Sept 2006

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.

This work is licensed under the Creative Commons Attribution-ShareAlike 3.0 License.
This licensing tag was added to this file as part of the GFDL licensing update.

File history

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	03:59, 13 September 2006		600×480 (8 KB)	Linas (talk \| contribs)	(== Summary == Graph of the sigma function :<math>\sigma_2(n)=\sum_{d\|n} d^2</math> in the range of <math>1\le n \le 250</math> )

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