id:A095862 - OEIS Search Results

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Numbers n such that number of decimal digits of n = number of divisors of n.

+0
13

1, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 121, 169, 289, 361, 529, 841, 961, 1003, 1006, 1007, 1011, 1018, 1027, 1037, 1041, 1042, 1043, 1046, 1047, 1055, 1057, 1059, 1067, 1073, 1077, 1079, 1081, 1082, 1094, 1099 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`An element of this sequence is prime iff it has 2 digits, which is the case for a(2)=11 through a(22) ; sequence A096489 lists exactly these and the leading term a(1)=1 (the only noncomposite number which is not prime). - M. F. Hasler, Nov 29 2007`
	CROSSREFS	`Cf. A096489 (= a(1)..a(22) = noncomposite elements of this sequence).` `Cf. A135772-A135779 (analogue for bases 2...9).` `Adjacent sequences: A095859 A095860 A095861 this_sequence A095863 A095864 A095865` `Sequence in context: A008364 A140461 A120533 this_sequence A125845 A108871 A135779`
	KEYWORD	`base,nonn`
	AUTHOR	`Ray Chandler (rayjchandler(AT)sbcglobal.net), Jun 28 2004`
	EXTENSIONS	`Edited by M. F. Hasler (Maximilian.Hasler(AT)gmail.com), Nov 29 2007`

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Last modified October 13 09:05 EDT 2008. Contains 145008 sequences.

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