What is the product of all positive factors of 12?  Choose the most appropriate option:
A) 39 B) 324 C) 1728 D) 3042 E) 5832
Positive factors of 12 are 1, 2, 3, 4, 6, 12.   So product is: 12*6*4*3*2*1= 
<gadget id="calculator">12*6*4*3*2*1</gadget>
<output>1_728</output>
1728   Answer: 1728
<result>C</result>
What is the product of all positive factors of 12?