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A236285
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a(n) = tau(n)^sigma(n), where tau(n) = A000005(n) = the number of divisors of n and sigma(n) = A000203(n) = the sum of divisors of n.
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5
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1, 8, 16, 2187, 64, 16777216, 256, 1073741824, 1594323, 68719476736, 4096, 6140942214464815497216, 16384, 281474976710656, 281474976710656, 4656612873077392578125, 262144, 2227915756473955677973140996096, 1048576, 481229803398374426442198455156736
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OFFSET
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1,2
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LINKS
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FORMULA
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EXAMPLE
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a(4) = tau(4)^sigma(4) = 3^7 = 2187.
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MATHEMATICA
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Table[DivisorSigma[0, n]^DivisorSigma[1, n], {n, 1000}]
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PROG
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(PARI) s=[]; for(n=1, 20, s=concat(s, sigma(n, 0)^sigma(n))); s \\ Colin Barker, Jan 22 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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STATUS
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approved
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