Search: id:A003680
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%I A003680 M1586
%S A003680 2,6,12,24,48,60,192,120,180,240,3072,360,12288,960,720,840,196608,1260,
%T A003680 786432,1680,2880,15360,12582912,2520,6480,61440,6300,6720,805306368,
%U A003680 5040,3221225472,7560,46080,983040,25920,10080,206158430208,3932160
%N A003680 Smallest number with 2n divisors.
%C A003680 Refers to the least number which is multiplicatively n-perfect, i.e. 
               least number m the product of whose divisors equals m^n. - Lekraj 
               Beedassy (blekraj(AT)yahoo.com), Sep 18 2004
%D A003680 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A003680 M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, 
               National Bureau of Standards Applied Math. Series 55, 1964 (and various 
               reprintings), p. 840.
%D A003680 A. H. Beiler, Recreations in the Theory of Numbers, Dover, NY, 1964, 
               p. 23.
%H A003680 T. D. Noe, <a href="b003680.txt">Table of n, a(n) for n=1..1000</a> (using 
               A005179)
%H A003680 M. Abramowitz and I. A. Stegun, eds., <a href="http://www.nrbook.com/
               abramowitz_and_stegun/">Handbook of Mathematical Functions</a>, National 
               Bureau of Standards, Applied Math. Series 55, Tenth Printing, 1972 
               [alternative scanned copy].
%F A003680 Bisection of A005179(n). - Lekraj Beedassy (blekraj(AT)yahoo.com), Sep 
               21 2004
%Y A003680 Cf. A061283
%Y A003680 Sequence in context: A053635 A054061 A118224 this_sequence A051487 A111286 
               A058295
%Y A003680 Adjacent sequences: A003677 A003678 A003679 this_sequence A003681 A003682 
               A003683
%K A003680 nonn,easy,nice
%O A003680 1,1
%A A003680 N. J. A. Sloane (njas(AT)research.att.com), Mira Bernstein
%E A003680 More terms from Jud McCranie (j.mccranie(AT)comcast.net) Oct 15 1997

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