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A015874
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Numbers k such that phi(k + 10) | (sigma(k) + 10).
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0
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OFFSET
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1,1
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COMMENTS
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LINKS
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MATHEMATICA
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Select[Range[10000], Divisible[DivisorSigma[1, #]+10, EulerPhi[#+10]]&] (* Harvey P. Dale, Jul 10 2021 *)
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PROG
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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STATUS
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approved
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