A217532 - OEIS

A217532

Numbers k such that sum of 4th power of digits of k equals the sum of prime divisors of k.

210, 1210, 2100, 12100, 21000, 21021, 36522, 63141, 89195, 92029, 112132, 116010, 118461, 121000, 149851, 203013, 203202, 210000, 214456, 303142, 304341, 313230, 323723, 331401, 351760, 416213, 441532, 524371, 534656, 574915, 610171, 654560, 897648, 999643

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OFFSET

1,1

COMMENTS

Numbers k such that A055013(k) = A008472(k).

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..10000

EXAMPLE

210 = 2*3*5*7 is in the sequence because 2^4 + 1^4 + 0^4 = 2 + 3 + 5 + 7 = 17.

MATHEMATICA

Rest[Select[Range[1000000], Total[Transpose[FactorInteger[#]][[1]]]==Total[IntegerDigits[#]^4]&]]

PROG