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 A030634 Numbers with 16 divisors. 18
 120, 168, 210, 216, 264, 270, 280, 312, 330, 378, 384, 390, 408, 440, 456, 462, 510, 520, 546, 552, 570, 594, 616, 640, 680, 690, 696, 702, 714, 728, 744, 750, 760, 770, 798, 858, 870, 888, 896, 910, 918, 920, 930, 945, 952, 966, 984, 1000 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Numbers of the form p^15 (subset of A010803), p*q^7, p*q*r^3 or p^3*q^3, or p*q*r*s, where p, q, r and s are distinct primes. - R. J. Mathar, Mar 01 2010 LINKS R. J. Mathar, Table of n, a(n) for n = 1..1000 Jérôme Germoni, Nombres à huit diviseurs, Images des Mathématiques, CNRS, 2017 (in French). MATHEMATICA Select[Range[3000], DivisorSigma[0, #]==16&] (* Vladimir Joseph Stephan Orlovsky, May 05 2011 *) PROG (PARI) is(n)=numdiv(n)==16 \\ Charles R Greathouse IV, Jun 19 2016 (MAGMA) [n: n in [1..1000] | DivisorSigma(0, n) eq 16]; // Vincenzo Librandi, Oct 05 2017 CROSSREFS Cf. A030626, A030631, A030632, A030633. Sequence in context: A179642 A099832 A111399 * A272594 A189975 A232461 Adjacent sequences:  A030631 A030632 A030633 * A030635 A030636 A030637 KEYWORD nonn AUTHOR STATUS approved

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Last modified October 22 17:39 EDT 2019. Contains 328319 sequences. (Running on oeis4.)