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A175747 Numbers with 38 divisors. 4

%I #20 May 04 2018 08:51:29

%S 786432,1310720,1835008,2883584,3407872,4456448,4980736,6029312,

%T 7602176,8126464,9699328,10747904,11272192,12320768,13893632,15466496,

%U 15990784,17563648,18612224,19136512,20709376,21757952,23330816,25427968,26476544,27000832,28049408

%N Numbers with 38 divisors.

%C Numbers of the forms p^37 and p^18*q^1, where p and q are distinct primes.

%H T. D. Noe, <a href="/A175747/b175747.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))=38.

%t Select[Range[10000000],DivisorSigma[0,#]==38&] (* _Vladimir Joseph Stephan Orlovsky_, May 06 2011 *)

%o (PARI) is(n)=numdiv(n)==38 \\ _Charles R Greathouse IV_, Jun 19 2016

%Y Cf. A175745, A175746, A139572.

%K nonn

%O 1,1

%A _Jaroslav Krizek_, Aug 27 2010

%E Extended by _T. D. Noe_, May 08 2011

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Last modified April 19 18:05 EDT 2024. Contains 371798 sequences. (Running on oeis4.)