Factors Expressed Geometrically

This really was one of those side pieces that led of something bigger, as part of how I got to where I got to and somewhat of a guide for those of you interested to see such steps :)

The basis of which, formed from visiting Wikipedia's article on Prime Numbers and seeing this below image:

This led me to form the below examples for the numbers 11, 12 and 36... which are hopefully self explanatory :)