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A349007
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a(1) = 1; for n > 1, a(n) is the largest number m such that sigma(m) = tau(m)^n or 0 if no such m exists.
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5
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1, 3, 7, 2667, 27559, 677207307, 225735769, 698915267211, 29587412978599, 811637999283747, 16907189874529, 12200855315219510767697163, 254155396405925065290841, 878412242330556407427, 1074593611687774330088252281, 16138807601873739769, 37471768236581557067194399
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OFFSET
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1,2
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COMMENTS
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See A051281 for numbers m such that sigma(m) = tau(m)^k where k = integer.
a(n) = 0 for n = 76, 81, ...
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LINKS
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EXAMPLE
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a(4) = 2667 because 2667 is the largest number m such that sigma(m) = tau(m)^4; sigma(2667) = 4096 = tau(2667)^4 = 8^4.
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PROG
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(PARI) See Links section.
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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