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A118720 Cubes which are divisible by the sum of their digits. 3

%I #15 Jun 29 2017 00:03:18

%S 1,8,27,216,512,1000,1728,4913,5832,8000,13824,17576,19683,27000,

%T 35937,46656,59319,64000,74088,110592,125000,157464,185193,216000,

%U 287496,314432,328509,343000,373248,421875,474552,512000,592704,658503,729000

%N Cubes which are divisible by the sum of their digits.

%C Intersection of A000578 and A005349. - _Robert Israel_, Jun 27 2017

%H Robert Israel, <a href="/A118720/b118720.txt">Table of n, a(n) for n = 1..10000</a>

%e 4913 is in the sequence because it is a cube, the sum of its digits is 4+9+1+3=17 and 4913 is divisible by 17.

%p select(t -> t mod convert(convert(t,base,10),`+`) = 0, map(t -> t^3, [$1..100])); # _Robert Israel_, Jun 28 2017

%t Select[Range[100]^3,Divisible[#,Total[IntegerDigits[#]]]&] (* _Harvey P. Dale_, Apr 25 2011 *)

%o (PARI) isok(n) = ispower(n,3) && ((n % sumdigits(n)) == 0); \\ _Michel Marcus_, Jun 28 2017

%Y Cf. A000578, A005349, A118547.

%K base,nonn

%O 1,2

%A Luc Stevens (lms022(AT)yahoo.com), May 21 2006

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Last modified April 16 00:00 EDT 2024. Contains 371696 sequences. (Running on oeis4.)