A133029 Divisors of 1729, the 2nd taxicab number (also called the Hardy-Ramanujan number).

1, 7, 13, 19, 91, 133, 247, 1729

Offset

1,2

Comments

Note that 19 * 91 = 1729. For products of n-th prime and n-th prime written backwards, see A133019.

Links

Table of n, a(n) for n=1..8.

Index entries for sequences related to divisors of numbers

Example

7 * 247 = 1729 and 13 * 133 = 1729.

Mathematica

Divisors[1729] (* Alonso del Arte, Oct 11 2019 *)

Prog

(PARI) divisors(1729) \\ Charles R Greathouse IV, Jun 21 2017

Crossrefs

Cf. A000005, A018487. Taxicab numbers: A011541.

Sequence in context: A070850 A060211 A355329 * A243962 A287304 A023984

Adjacent sequences: A133026 A133027 A133028 * A133030 A133031 A133032

Keyword

easy,fini,full,nonn

Author

Omar E. Pol, Oct 23 2007, Nov 07 2007

Status

approved