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A088845
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Multiply perfect numbers k for which the quotient sigma_5(k)/k = A001160(k)/k is nonintegral.
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3
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496, 523776, 23569920, 142990848, 275502900594021408, 622286506811515392, 71065075104190073088, 34384125938411324962897920, 41254809330254618094796800000, 2360137508360958913826987704320, 11990459635691909131039408128000, 24862223033124742964111030747136
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OFFSET
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1,1
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LINKS
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PROG
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(PARI) lista() = {v = readvec("b007691.txt"); for (i=1, #v, vi = v[i]; if (sigma(vi, 5) % vi, print1(vi, ", "); ); ); } \\ Michel Marcus, Dec 26 2013
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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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