What is the sum of the different positive prime factors of 880?
Select:
A) 5	B) 10	C) 15	D) 18	E) 21
Prime factorization of 880   =88 * 10   =8*11 * 10   =2*4 * 2*5 * 11   =2* 2*2 * 2*5 * 11   =2^4 * 5 * 11   Sum of the different positive prime factors of 880 = 2+5+11= 
<gadget id="calculator">2+5+11</gadget>
<output>18</output>
18   Answer 18
<result>D</result>
What is the sum of the different positive prime factors of 880?