How many ways can 840 be written as the product of two numbers ? Choose the correct answer:
A) 32  B) 16  C) 6  D) 18  E) 8
factor of 840 = 2*2*2*3*5*7;   Total number of method to select the combination = (3+1)*(1+1)*(1+1)*(1+1)/2= 
<gadget id="calculator">(3+1)*(1+1)*(1+1)*(1+1)/2</gadget>
<output>16</output>
16   (here we should make attention in one step that a*b and b*a will be considered as 1 case)   ANSWER:16
<result>B</result>
How many ways can 840 be written as the product of two numbers ?