$$16$$：$$1$$, $$2$$, $$4$$, $$8$$, $$16$$  $$17$$：$$1$$, $$17$$  $$18$$：$$1$$, $$2$$, $$3$$, $$6$$, $$9$$, $$18$$  $$19$$：$$1$$, $$19$$  $$20$$：$$1$$, $$2$$, $$4$$, $$5$$, $$10$$, $$20$$ 
How many numbers in the number set $16,17,18,19$ and $20$ have more than $3$ factors? 
Options:
a: $$1$$ 
b: $$2$$ 
c: $$3$$ 
d: $$4$$ 
e: $$5$$ 