id:A055698 - OEIS Search Results

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Numbers n such that n | Sigma_4(n) + Phi(n)^4.

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1, 2, 6, 13588, 48238, 54490, 69004, 194460, 353228, 577980, 638652 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`sigma_4(n) is the sum of the 4th powers of the divisors of n (A001159).`
	MATHEMATICA	`Do[If[Mod[DivisorSigma[4, n]+EulerPhi[n]^4, n]==0, Print[n]], {n, 1, 10^6}]`
	CROSSREFS	`Sequence in context: A071093 A114045 A116899 this_sequence A121167 A115658 A005607` `Adjacent sequences: A055695 A055696 A055697 this_sequence A055699 A055700 A055701`
	KEYWORD	`nonn`
	AUTHOR	`Robert G. Wilson v (rgwv(AT)rgwv.com), Jun 09 2000`

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.