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A055702 Numbers n such that n | Sigma_8(n) + Phi(n)^8. 0
1, 2, 6, 86, 2033, 9617, 32052, 439369, 552012, 708292, 849660, 1869252, 2038140, 2083244, 2350089, 2569210, 2930460, 3875508, 4973090, 7248671, 13864156, 23500890, 25516264, 45711708, 57226685, 109512060, 112389732, 197121708, 240926532, 386807715, 395172531 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

sigma_8(n) is the sum of the 8th powers of the divisors of n (A013956).

LINKS

Table of n, a(n) for n=1..31.

MATHEMATICA

Do[If[Mod[DivisorSigma[8, n]+EulerPhi[n]^8, n]==0, Print[n]], {n, 1, 10^5}]

PROG

(PARI) isok(n) = !((sigma(n, 8) + eulerphi(n)^8) % n); \\ Michel Marcus, Mar 02 2014

CROSSREFS

Sequence in context: A118537 A109892 A268534 * A305598 A179214 A128265

Adjacent sequences:  A055699 A055700 A055701 * A055703 A055704 A055705

KEYWORD

nonn

AUTHOR

Robert G. Wilson v, Jun 09 2000

EXTENSIONS

More terms from Michel Marcus, Mar 02 2014

STATUS

approved

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Last modified November 19 06:03 EST 2019. Contains 329310 sequences. (Running on oeis4.)