id:A055707 - OEIS Search Results

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Numbers n such that n | Sigma_13(n) + Phi(n)^13.

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1, 2, 12, 34, 42, 90, 170, 198, 402, 434, 456, 482, 494, 2046, 4086, 4518, 7520, 7605, 8622, 9632, 10924, 28280, 51570, 51714, 74124, 77724 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`sigma_13(n) is the sum of the 13th powers of the divisors of n.`
	MATHEMATICA	`Do[If[Mod[DivisorSigma[13, n]+EulerPhi[n]^13, n]==0, Print[n]], {n, 1, 10^5}]`
	CROSSREFS	`Sequence in context: A133577 A106185 A098203 this_sequence A055699 A062094 A011379` `Adjacent sequences: A055704 A055705 A055706 this_sequence A055708 A055709 A055710`
	KEYWORD	`nonn`
	AUTHOR	`Robert G. Wilson v (rgwv(AT)rgwv.com), Jun 09 2000`

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Last modified December 4 23:11 EST 2009. Contains 170347 sequences.

AT&T Labs Research