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 A137493 Numbers with 30 divisors. 7
 720, 1008, 1200, 1584, 1620, 1872, 2268, 2352, 2448, 2592, 2736, 2800, 3312, 3564, 3888, 3920, 4050, 4176, 4212, 4400, 4464, 4608, 5200, 5328, 5508, 5808, 5904, 6156, 6192, 6768, 6800, 7452, 7500, 7600, 7632, 7938, 8112, 8496, 8624, 8784, 9200, 9396 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Maple implementation: see A030513. Numbers of the form p^29 (subset of A122970), p*q^2*r^4 (A179669), p^4*q^5 (A179702), p^2*q^9 (like 4608) or p*q^14, where p, q and r are distinct primes. - R. J. Mathar, Mar 01 2010 LINKS T. D. Noe, Table of n, a(n) for n = 1..1000 FORMULA A000005(a(n))=30. MATHEMATICA Select[Range[10000], DivisorSigma[0, #]==30&]  (* Harvey P. Dale, Feb 18 2011 *) PROG (PARI) is(n)=numdiv(n)==30 \\ Charles R Greathouse IV, Jun 19 2016 CROSSREFS Cf. A137492 (29 divs), A139571 (31 divs). Sequence in context: A068351 A067892 A257416 * A179669 A067808 A302127 Adjacent sequences:  A137490 A137491 A137492 * A137494 A137495 A137496 KEYWORD nonn AUTHOR R. J. Mathar, Apr 22 2008 STATUS approved

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Last modified January 19 06:37 EST 2020. Contains 331033 sequences. (Running on oeis4.)