Image:Divisor square.svg
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[edit] Summary
Graph of the sigma function
-
σ2(n) = ∑ d2 d | n
in the range of 
[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.
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- (del) (cur) 03:59, 13 September 2006 . . Linas (Talk | contribs) . . 600×480 (7,854 bytes) (== 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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