What is the sum of the different positive prime factors of 1040?
Choose the most appropriate option.
A) 10 B) 14 C) 15 D) 18 E) 20
I think answer is 20: 20   1040 = 2*2*2*2*5*13   Sum of theDIFF20R20NTpositive prime factors = 2 + 5 + 13= 
<gadget id="calculator">2 + 5 + 13</gadget>
<output>20</output>
20
<result>E</result>
What is the sum of the different positive prime factors of 1040?