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A015873
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Numbers k such that phi(k + 8) | sigma(k) + 8.
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0
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7, 27, 56, 91, 112, 156, 355, 988, 8925, 28518, 36655, 76999, 132943, 360432, 683575, 1412464, 3430111, 11097188, 83623927, 404412907, 288039497527
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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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Cases[Range[10000],
x_ /; Divisible[DivisorSigma[1, x] + 8, EulerPhi[x + 8]] == True] (* David Nacin, Feb 28 2012 *)
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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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