1,2

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.

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

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

Cf. A190997, A034690.

Sequence in context: A324105 A328871 A169819 * A218703 A326641 A144372

Adjacent sequences: A134678 A134679 A134680 * A134682 A134683 A134684

nonn,base

Reinhard Zumkeller, Nov 06 2007

New name from Jaroslav Krizek, Jun 15 2011.

approved