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A175750 Numbers with 42 divisors. 3
2880, 4032, 4800, 6336, 7488, 9408, 9792, 10944, 11200, 13248, 14580, 15552, 15680, 16704, 17600, 17856, 20412, 20800, 21312, 23232, 23328, 23616, 24768, 27072, 27200, 30400, 30528, 32076, 32448, 33984, 34496, 35136, 36450, 36800, 37908, 38592, 38720, 40768 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Numbers of the forms p^41, p^20*q^1, p^13*q^2, p^6*q^5 and p^6*q^2*r^1, where p, q, and r are distinct primes.

LINKS

T. D. Noe, Table of n, a(n) for n = 1..1000

OEIS Wiki, Index entries for number of divisors

FORMULA

A000005(a(n))=42.

MATHEMATICA

Select[Range[50000], DivisorSigma[0, #]==42&] (* Vladimir Joseph Stephan Orlovsky, May 04 2011 *)

PROG

(PARI) is(n)=numdiv(n)==42 \\ Charles R Greathouse IV, Jun 19 2016

CROSSREFS

Cf. A137484, A137488.

Sequence in context: A081427 A101999 A066174 * A179703 A260369 A134856

Adjacent sequences:  A175747 A175748 A175749 * A175751 A175752 A175753

KEYWORD

nonn

AUTHOR

Jaroslav Krizek, Aug 27 2010

EXTENSIONS

Extended by T. D. Noe, May 08 2011

STATUS

approved

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Last modified October 15 18:26 EDT 2019. Contains 328037 sequences. (Running on oeis4.)