The integer N has exactly 6 different factors (including 1 and N), and the product of the 5 factors is 648. What is the other factor of the integer N?
整数N恰好具有6个不同的因数(包括1和N在内)，其中5个因数之积是648，那么，整数N的另一个因数是多少？
<gadget id="calculator">18 / 2</gadget>
<output>9</output>

<result>9</result>