What is the difference between finite and infinite?

Finite means limited in number.

Example :

Factors of 20 are 1, 2, 4, 5, 10, 20.

They are limited in numbers, so factors are infinite.

Infinite means limitless or endless in number.

Example :

Multiples of 5 are 5, 10, 15, 20...

They are endless, so multiples are Infinite.