| Jon Perry on Mon, 22 Mar 2004 18:07:03 +0100 |
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| sigma |
? sigma(4,1.5)
*** this should be an integer: sigma(4,1.5)
^----
? ?sigma
sigma(x,{k=1}): sum of the k-th powers of the divisors of x. k is optional
and
if omitted is assumed to be equal to 1.
Is there a technical reason for k being an integer?
Jon Perry
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