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A134681 Number of digits of all the divisors of n. 5
1, 2, 2, 3, 2, 4, 2, 4, 3, 5, 3, 7, 3, 5, 5, 6, 3, 7, 3, 8, 5, 6, 3, 10, 4, 6, 5, 8, 3, 11, 3, 8, 6, 6, 5, 12, 3, 6, 6, 11, 3, 11, 3, 9, 8, 6, 3, 14, 4, 9, 6, 9, 3, 11, 6, 11, 6, 6, 3, 18, 3, 6, 8, 10, 6, 12, 3, 9, 6, 12, 3, 17, 3, 6, 9, 9, 6, 12, 3, 15, 7, 6, 3, 18, 6, 6, 6, 12, 3, 18, 6, 9, 6, 6, 6, 18 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(n) = A055642(A037278(n)).

A134682(n) = Min{m: a(m) = n}.

Also number of digits of concatenation of all divisors of n (A037278). - Jaroslav Krizek, Jun 15 2011.

LINKS

R. Zumkeller, Table of n, a(n) for n = 1..10000

MATHEMATICA

Array[Total[IntegerLength[Divisors[#]]]&, 100] (* Harvey P. Dale, Jun 08 2013 *)

CROSSREFS

Cf. A190997, A034690.

Sequence in context: A324105 A328871 A169819 * A218703 A326641 A144372

Adjacent sequences:  A134678 A134679 A134680 * A134682 A134683 A134684

KEYWORD

nonn,base

AUTHOR

Reinhard Zumkeller, Nov 06 2007

EXTENSIONS

New name from Jaroslav Krizek, Jun 15 2011.

STATUS

approved

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Last modified December 3 11:58 EST 2020. Contains 338900 sequences. (Running on oeis4.)