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A133029 Divisors of 1729, the 2nd taxicab number (also called the Hardy-Ramanujan number). 5
1, 7, 13, 19, 91, 133, 247, 1729 (list; graph; refs; listen; history; text; internal format)
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: A024954 A070850 A060211 * 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

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Last modified December 11 07:38 EST 2019. Contains 329914 sequences. (Running on oeis4.)