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13:37, 28 February 2013 Jumpow uploaded "Файл:Divisor square.svg" (Graph of the sigma function : in the range of )
The original description page was here. All following user names refer to en.wikipedia.
2006-09-13 03:59 Linas 600×480× (7854 bytes) == Summary == Graph of the [[:en:divisor function|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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{{Information |Description ={{en|1=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>}} {{ru|1=График сигма-функции <math>\sigma_2(n)=\sum_{d|n} d^2</math> в ...