id:A055703 - OEIS Search Results

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Numbers n such that n | Sigma_9(n) + Phi(n)^9.

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1, 2, 12, 54, 76, 90, 216, 423, 514, 531, 621, 2166, 2241, 2772, 2976, 4752, 5154, 5400, 5481, 6264, 7290, 7344, 9018, 9144, 9470, 9555, 14094, 14904, 19494, 21222, 23780, 25848, 28323, 34830, 34911, 38220, 40122, 48768, 49079, 55782, 59400 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`sigma_9(n) is the sum of the 9th powers of the divisors of n.`
	MATHEMATICA	`Do[If[Mod[DivisorSigma[9, n]+EulerPhi[n]^9, n]==0, Print[n]], {n, 1, 10^5}]`
	CROSSREFS	`Sequence in context: A007225 A139046 A036359 this_sequence A006738 A111642 A122676` `Adjacent sequences: A055700 A055701 A055702 this_sequence A055704 A055705 A055706`
	KEYWORD	`nonn`
	AUTHOR	`Robert G. Wilson v (rgwv(AT)rgwv.com), Jun 09 2000`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

AT&T Labs Research