因为$$120$$的因数有：$$1$$、$$2$$、$$3$$、$$4$$、$$5$$、$$6$$、$$8$$、$$10$$、$$12$$、$$15$$、$$20$$、$$24$$、$$30$$、$$40$$、$$60$$、$$120$$，所以一共有$$16$$个因数．  故选$$\text{D}$$． 
$$120$$有个因数． 
(1) $$20$$ 
(2) $$18$$ 
(3) $$24$$ 
(4) $$16$$ 