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A055701 Numbers n such that n | Sigma_7(n) + Phi(n)^7. 0
1, 2, 10, 12, 26, 42, 172, 456, 588, 1326, 3315, 3635, 6468, 6720, 12102, 12922, 15288, 17836, 18810, 21756, 32984, 36108, 36603, 40572, 41748, 72905, 78120 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

sigma_7(n) is the sum of the 7th powers of the divisors of n.

LINKS

Table of n, a(n) for n=1..27.

MATHEMATICA

Do[If[Mod[DivisorSigma[7, n]+EulerPhi[n]^7, n]==0, Print[n]], {n, 1, 10^5}]

CROSSREFS

Sequence in context: A022367 A004686 A080139 * A176978 A186630 A154391

Adjacent sequences:  A055698 A055699 A055700 * A055702 A055703 A055704

KEYWORD

nonn

AUTHOR

Robert G. Wilson v, Jun 09 2000

STATUS

approved

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Last modified May 23 00:23 EDT 2013. Contains 225585 sequences.