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 A062713 Numbers k such that the sum of the digits of k is a prime factor of k. 2
 2, 3, 5, 7, 12, 20, 21, 30, 50, 70, 102, 110, 111, 120, 133, 140, 200, 201, 209, 210, 230, 247, 300, 308, 320, 322, 364, 407, 410, 476, 481, 500, 506, 511, 605, 629, 700, 704, 715, 782, 803, 832, 874, 902, 935, 1002, 1010, 1011, 1015, 1020, 1040, 1066, 1088 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Harry J. Smith, Table of n, a(n) for n = 1..1000 EXAMPLE 2 is an element since 2 is a prime factor of 2; 12 is an element since 1 + 2 = 3 and 3 is a prime factor of 12. MATHEMATICA sdpfQ[n_]:=MemberQ[Transpose[FactorInteger[n]][[1]], Total[ IntegerDigits[ n]]]; Select[Range[2, 1100], sdpfQ] (* Harvey P. Dale, Sep 24 2012 *) PROG (PARI) ok(k)={my(s=sumdigits(k)); k % s==0 && isprime(s)} \\ Andrew Howroyd, Jun 28 2018 CROSSREFS Sequence in context: A018065 A048818 A318745 * A086108 A052430 A235153 Adjacent sequences:  A062710 A062711 A062712 * A062714 A062715 A062716 KEYWORD nonn,base,easy AUTHOR Lisa O Coulter (lisa_coulter(AT)my-deja.com), Jul 14 2001 EXTENSIONS Corrected and extended by Larry Reeves (larryr(AT)acm.org) and Dean Hickerson, Jul 16 2001 STATUS approved

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Last modified March 31 16:44 EDT 2020. Contains 333151 sequences. (Running on oeis4.)