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A055700 Numbers n such that n | Sigma_6(n) + Phi(n)^6. 0
1, 2, 6, 22, 84, 350, 525, 1150, 1652, 2366, 2996, 6677, 8140, 8371, 9084, 11510, 11825, 27885, 30694, 43000, 44988, 45060, 49585, 172250, 207194, 312312, 335634, 364084, 568575, 887250, 1183000, 1588956, 1799240, 1829256, 1913975, 2455350, 3523800, 3678454 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

sigma_6(n) is the sum of the 6th powers of the divisors of n (A013954).

LINKS

Table of n, a(n) for n=1..38.

MATHEMATICA

Do[If[Mod[DivisorSigma[6, n]+EulerPhi[n]^6, n]==0, Print[n]], {n, 1, 10^5}]

PROG

(PARI) isok(n) = !((sigma(n, 6) + eulerphi(n)^6) % n); \\ Michel Marcus, Mar 02 2014

CROSSREFS

Sequence in context: A151288 A150245 A150246 * A279563 A150247 A150248

Adjacent sequences:  A055697 A055698 A055699 * A055701 A055702 A055703

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 August 26 05:50 EDT 2019. Contains 326330 sequences. (Running on oeis4.)