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 A139571 Numbers with 31 divisors. 20
 1073741824, 205891132094649, 931322574615478515625, 22539340290692258087863249, 17449402268886407318558803753801, 2619995643649944960380551432833049 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS 30th powers of primes. The n-th number with p divisors is equal to the n-th prime raised to power p-1, where p is prime. Start of 31st row of A073915. [From R. J. Mathar, Jun 27 2009, Jun 28 2009] LINKS T. D. Noe, Table of n, a(n) for n = 1..1000 OEIS Wiki, Index entries for number of divisors FORMULA a(n)=A000040(n)^(31-1)=A000040(n)^30. a(n)=A122971(A000040(n)). - R. J. Mathar, Jun 27 2009 MATHEMATICA Prime[Range[11]]^30 (* Vladimir Joseph Stephan Orlovsky, May 05 2011 *) PROG (PARI) a(n)=prime(n)^30 \\ Charles R Greathouse IV, Jun 19 2016 CROSSREFS Cf. A137493 (30 divs), A175742 (32 divs). Sequence in context: A017494 A017626 A122971 * A134595 A217610 A219319 Adjacent sequences:  A139568 A139569 A139570 * A139572 A139573 A139574 KEYWORD nonn,easy AUTHOR Omar E. Pol, May 07 2008 STATUS approved

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Last modified October 23 03:21 EDT 2019. Contains 328335 sequences. (Running on oeis4.)