A197309 Divisors of the 9th repunit 111111111.

1, 3, 9, 37, 111, 333, 333667, 1001001, 3003003, 12345679, 37037037, 111111111

Offset

1,2

Comments

The prime factorization of (10^9 - 1)/9 is 3^2 * 37 * 333667. - Alonso del Arte, Apr 27 2014

Links

Table of n, a(n) for n=1..12.

Index entries for sequences related to divisors of numbers.

Mathematica

Divisors[(10^9 - 1)/9] (* Alonso del Arte, Apr 27 2014 *)

Prog

(PARI) divisors(10^9\9) \\ Charles R Greathouse IV, Jun 21 2017

Crossrefs

Cf. A109492, A197308, A070529, A018282, A018766, A027894, A027893, A027892, A027891, A027890, A027889, A027895.

Sequence in context: A076964 A034808 A018398 * A149021 A149022 A134818

Adjacent sequences: A197306 A197307 A197308 * A197310 A197311 A197312

Keyword

nonn,fini,full,easy

Author

M. F. Hasler, Oct 13 2011

Status

approved