What is the sum of the different positive prime factors of 630?
Select:
A) 7
B) 10
C) 17
D) 20
E) 24
The prime factorization of 630   = 63 * 10   = 7*9 * 2*5   = 7*3^2 * 2*5   The sum of the different positive prime factors = 2+3+5+7= 
<gadget id="calculator">2+3+5+7</gadget>
<output>17</output>
17   The answer is 17.
<result>C</result>
What is the sum of the different positive prime factors of 630?