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 A073807 Number of divisors of sum of cube of divisors. 0
 1, 3, 6, 2, 12, 18, 8, 12, 2, 20, 18, 12, 8, 24, 36, 4, 32, 6, 24, 24, 24, 30, 36, 72, 4, 24, 32, 16, 24, 60, 36, 16, 60, 48, 60, 4, 16, 72, 24, 80, 24, 72, 24, 36, 24, 60, 60, 24, 8, 12, 96, 16, 20, 96, 80, 96, 50, 40, 72, 72, 16, 108, 16, 8, 54, 100, 12, 64, 108, 100, 32, 24 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS FORMULA a(n)=A000005[A001158(n)]=d[sigma[3, n]] EXAMPLE n=10:D={1,2,5,10}, sigma[3,10]=1+8+125+1000=1134, D[1134]={1,2,3,6,7,9,14,18,21,27,42,54,63,81,126, 162,189,378,567,1134} so a(10)=20. MATHEMATICA Table[DivisorSigma[0, DivisorSigma[3, n]], {n, 80}] (* Harvey P. Dale, Dec 13 2011 *) CROSSREFS Cf. A000005, A001158, A062068, A073802-A073813. Sequence in context: A210199 A268717 A002516 * A345671 A090774 A147995 Adjacent sequences: A073804 A073805 A073806 * A073808 A073809 A073810 KEYWORD nonn AUTHOR Labos Elemer, Aug 13 2002 STATUS approved

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Last modified February 1 04:32 EST 2023. Contains 359981 sequences. (Running on oeis4.)