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A055700
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Numbers n such that n | Sigma_6(n) + Phi(n)^6.
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0
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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
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OFFSET
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1,2
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COMMENTS
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sigma_6(n) is the sum of the 6th powers of the divisors of n (A013954).
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LINKS
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MATHEMATICA
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Do[If[Mod[DivisorSigma[6, n]+EulerPhi[n]^6, n]==0, Print[n]], {n, 1, 10^5}]
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PROG
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(PARI) isok(n) = !((sigma(n, 6) + eulerphi(n)^6) % n); \\ Michel Marcus, Mar 02 2014
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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