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 A030630 Numbers with 12 divisors. 14
 60, 72, 84, 90, 96, 108, 126, 132, 140, 150, 156, 160, 198, 200, 204, 220, 224, 228, 234, 260, 276, 294, 306, 308, 315, 340, 342, 348, 350, 352, 364, 372, 380, 392, 414, 416, 444, 460, 476, 486, 490, 492, 495, 500, 516, 522, 525, 532, 544, 550 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Numbers of the form p^11 A079395, p*q^5 A178740, p*q*r^2 A085987, or p^2*q^3 A143610, where p, q and r are distinct primes. - R. J. Mathar, Mar 01 2010, Mar 17 2010 LINKS R. J. Mathar, Table of n, a(n) for n = 1..1000 MATHEMATICA Select[Range[600], Length[Divisors[ # ]] == 12 &] (* Stefan Steinerberger, Apr 10 2006 *) Select[Range[600], DivisorSigma[0, #]==12&] (* Harvey P. Dale, Jun 01 2016 *) PROG (PARI) for(n=1, 1e3, if(numdiv(n)==12, print1(n, ", "))) \\ Altug Alkan, Nov 11 2015 CROSSREFS Sequence in context: A216828 A131564 A036457 * A068350 A265712 A114837 Adjacent sequences:  A030627 A030628 A030629 * A030631 A030632 A030633 KEYWORD nonn AUTHOR STATUS approved

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Last modified October 22 14:44 EDT 2019. Contains 328318 sequences. (Running on oeis4.)