A027901 Divisors of 10^9 + 1.

1, 7, 11, 13, 19, 77, 91, 133, 143, 209, 247, 1001, 1463, 1729, 2717, 19019, 52579, 368053, 578369, 683527, 999001, 4048583, 4784689, 6993007, 7518797, 10989011, 12987013, 52631579, 76923077, 90909091, 142857143, 1000000001

Offset

1,2

Comments

The prime factorization of 10^9 + 1 = 7 * 11 * 13 * 19 * 52579, so tau(1000000001) = 2^5 = 32. - Bernard Schott, Oct 18 2019

Links

Table of n, a(n) for n=1..32.

Index entries for sequences related to divisors of numbers

Example

7 * 142857143 = 1000000001.
11 * 90909091 = 1000000001.
13 * 76923077 = 1000000001.

Mathematica

Divisors[10^9 + 1] (* Alonso del Arte, Oct 11 2019 *)

Prog

(PARI) divisors(10^9+1) \\ Charles R Greathouse IV, Jun 23 2017

Crossrefs

Cf. A018768, A133029.

Sequence in context: A075521 A084444 A081091 * A129213 A110966 A163388

Adjacent sequences: A027898 A027899 A027900 * A027902 A027903 A027904

Keyword

nonn,fini,full,easy

Author

N. J. A. Sloane.

Status

approved