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A137486 Numbers with 23 divisors. 18

%I

%S 4194304,31381059609,2384185791015625,3909821048582988049,

%T 81402749386839761113321,3211838877954855105157369,

%U 1174562876521148458974062689,13569980418174090907801371961

%N Numbers with 23 divisors.

%C Maple implementation: see A030513.

%C 22nd 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. - _Omar E. Pol_, May 06 2008

%H T. D. Noe, <a href="/A137486/b137486.txt">Table of n, a(n) for n = 1..1000</a>

%H OEIS Wiki, <a href="https://oeis.org/wiki/Index_entries_for_number_of_divisors">Index entries for number of divisors</a>

%F A000005(a(n))=23.

%F a(n)=A000040(n)^(23-1)=A000040(n)^(22). - _Omar E. Pol_, May 06 2008

%t Prime[Range[15]]^22 (* _Vladimir Joseph Stephan Orlovsky_, May 05 2011 *)

%o (PARI) a(n)=prime(n)^22 \\ _Charles R Greathouse IV_, Jun 19 2016

%Y Cf. A137485 (22 divs), A137487 (24 divs).

%K nonn,easy

%O 1,1

%A _R. J. Mathar_, Apr 22 2008

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Last modified November 20 05:07 EST 2019. Contains 329323 sequences. (Running on oeis4.)