Following are some very interesting facts about Factors.
Fact 1 = Every number is a factor of itself.
Fact 2 = Every factor of a given number is either less than or equal to given number.
Fact 3 = 1 is a factor of every given number.
Fact 4 = Every factor of a given number is an exact divisor of that given number.
Fact 5 = Number of factors of a given number are finite
Explanation of "Facts of Factors" with examples is available in the above links.

