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

Offset: 1

Author

Michel Lagneau, Oct 05 2012

Keywords

• nonn
• easy
• base

Comments

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

Examples

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

Crossrefs

Cf. A055013, A008472.

Programs

Mathematica

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