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A063375 Number of divisors of Fibonacci(n). 27
1, 1, 2, 2, 2, 4, 2, 4, 4, 4, 2, 15, 2, 4, 8, 8, 2, 16, 4, 16, 8, 4, 2, 72, 6, 4, 16, 16, 2, 64, 4, 16, 8, 4, 8, 160, 8, 8, 8, 64, 4, 64, 2, 32, 32, 8, 2, 336, 8, 48, 8, 16, 4, 128, 16, 96, 32, 8, 4, 960, 4, 8, 32, 64, 8, 64, 8, 32, 32, 128, 4, 1536, 4, 16, 48, 32, 16, 128, 4, 512, 128, 8 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..1408 (terms 1..1000 from T. D. Noe using Blair Kelly's data)

Blair Kelly, Fibonacci and Lucas Factorizations

FORMULA

a(n) = A000005(A000045(n)). - Omar E. Pol, Dec 20 2008

MATHEMATICA

Table[Length[Divisors[Fibonacci[n]]], {n, 120}] (* Vladimir Joseph Stephan Orlovsky, Jul 01 2011 *)

Table[DivisorSigma[0, Fibonacci[n]], {n, 1, 100}] (* Vaclav Kotesovec, Feb 13 2019 *)

PROG

(PARI) j=[]; for(n=1, 150, j=concat(j, numdiv(fibonacci(n)))); j

(PARI) for (n = 1, 466, write("b063375.txt", n, " ", numdiv(fibonacci(n)))) \\ Harry J. Smith, Aug 20 2009

CROSSREFS

Cf. A000005, A000045.

Sequence in context: A152674 A072056 A066012 * A064129 A005137 A222959

Adjacent sequences:  A063372 A063373 A063374 * A063376 A063377 A063378

KEYWORD

easy,nonn,changed

AUTHOR

Jason Earls, Jul 23 2001

STATUS

approved

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Last modified October 17 06:08 EDT 2019. Contains 328106 sequences. (Running on oeis4.)