A245029 Divisors of 3^36 - 1.

1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 19, 20, 26, 28, 35, 37, 38, 40, 52, 56, 65, 70, 73, 74, 76, 80, 91, 95, 104, 112, 130, 133, 140, 146, 148, 152, 182, 185, 190, 208, 247, 259, 260, 266, 280, 292, 296, 304, 364, 365, 370, 380, 455, 481, 494, 511, 518, 520

Offset

1,2

Comments

Also, divisors of 9^18-1. Number of divisors of k^18-1 for k = 2..20: 32 (2), 128 (3), 512 (4), 512 (5), 128 (6), 640 (7), 160 (8), 1280 (9), 640 (10), 1024 (11), 512 (12), 2048 (13), 1024 (14), 1536 (15), 8192 (16), 3840 (17), 512 (18), 5120 (19), 512 (20).

Links

Bruno Berselli, Table of n, a(n) for n = 1..1280

Index entries for sequences related to divisors of numbers

Example

150094635296999120 = 2^4 * 5 * 7 * 13 * 19 * 37 * 73 * 757 * 530713.

Mathematica

Divisors[3^36 - 1]

Prog

(PARI) divisors(3^36-1)
(Sage) divisors(3^36-1)
(Magma) Divisors(3^36-1);
(Maxima) divisors(3^36-1);

Crossrefs

Cf. A018614: divisors of 3^6-1.

Cf. A113522: divisors of 10^18-1; A003543: divisors of 2^36-1.

Sequence in context: A229968 A190853 A343108 * A027902 A067076 A060686

Adjacent sequences: A245026 A245027 A245028 * A245030 A245031 A245032

Keyword

nonn,fini,full

Author

Bruno Berselli, Jul 10 2014

Status

approved