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A133029 Divisors of 1729, the 2nd taxicab number (also called the Hardy-Ramanujan number). 5

%I

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

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

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

%H <a href="/index/Di#divisors">Index entries for sequences related to divisors of numbers</a>

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

%t Divisors[1729] (* _Alonso del Arte_, Oct 11 2019 *)

%o (PARI) divisors(1729) \\ _Charles R Greathouse IV_, Jun 21 2017

%Y Cf. A000005, A018487. Taxicab numbers: A011541.

%K easy,fini,full,nonn

%O 1,2

%A _Omar E. Pol_, Oct 23 2007, Nov 07 2007

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Last modified January 25 07:33 EST 2020. Contains 331241 sequences. (Running on oeis4.)