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

Author

N. J. A. Sloane

Keywords

• nonn
• fini
• full
• easy

Comments

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

Examples

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

Links

• Index entries for sequences related to divisors of numbers

Crossrefs

Cf. A018768, A133029.

Programs

Mathematica

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

PARI

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