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A067283 Numbers n such that the number of divisors of n is floor(log(n)). 1

%I #13 Jul 21 2019 12:26:28

%S 11,13,17,19,25,49,55,57,58,62,65,69,74,77,82,85,86,87,91,93,94,95,

%T 106,111,115,118,119,122,123,125,129,133,134,141,142,143,145,146,404,

%U 412,423,425,428,436,452,475,477,507,508,524,531,539,548,549,556,575,578

%N Numbers n such that the number of divisors of n is floor(log(n)).

%H Amiram Eldar, <a href="/A067283/b067283.txt">Table of n, a(n) for n = 1..10000</a>

%F n such that A000005(n) = A000195(n).

%t Select[Range[600],DivisorSigma[0,#]==Floor[Log[#]]&] (* _Harvey P. Dale_, May 07 2018 *)

%Y Cf. A000005, A000195.

%K nonn

%O 1,1

%A _Benoit Cloitre_, Feb 24 2002

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Last modified August 13 12:52 EDT 2024. Contains 375142 sequences. (Running on oeis4.)