Divisor function: Difference between revisions

Revision as of 03:56, 12 June 2023

Revision as of 22:26, 2 August 2023

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:<math>\sigma_x(n) = \prod_{i=1}^{r} \frac{p_{i}^{(a_{i}+1)x}-1}{p_{i}^x-1}.</math>

When ''x''&nbsp;=&nbsp;0, ''d''<math>\sigma_0(''n'')</math> is: {{sfnp|Hardy|Wright|2008|pp=310 f|loc=§16.7}}

:<math>\sigma_0(n)=\prod_{i=1}^r (a_i+1).</math>