You can put this solution on YOUR website! 2160:
divide by 2 to get: (2)(1080)
again: (2)(2)(540)
again: (2)(2)(2)(270)
again:(2)(2)(2)(2)(135) done since 135 is odd.
now use 3:
(2)(2)(2)(2)(3)(45)
(2)(2)(2)(2)(3)(3)(15)
(2)(2)(2)(2)(3)(3)(3)(5)
this is