A067283 - OEIS

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A067283

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

11, 13, 17, 19, 25, 49, 55, 57, 58, 62, 65, 69, 74, 77, 82, 85, 86, 87, 91, 93, 94, 95, 106, 111, 115, 118, 119, 122, 123, 125, 129, 133, 134, 141, 142, 143, 145, 146, 404, 412, 423, 425, 428, 436, 452, 475, 477, 507, 508, 524, 531, 539, 548, 549, 556, 575, 578

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..10000

FORMULA

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

MATHEMATICA

Select[Range[600], DivisorSigma[0, #]==Floor[Log[#]]&] (* Harvey P. Dale, May 07 2018 *)

CROSSREFS

Cf. A000005, A000195.

Sequence in context: A244913 A098415 A329176 * A052259 A103900 A337803

Adjacent sequences: A067280 A067281 A067282 * A067284 A067285 A067286

KEYWORD

nonn

AUTHOR

Benoit Cloitre, Feb 24 2002

STATUS

approved