Area of Rectangles

A rectangle that has an area of 2 square units has two possibilities: dimensions of 1 by 2 or 2 by 1. The same is true a rectangle with an area of 3 square units: the dimensions are 1 by 3 or 3 by 1. How many rectangles can you make that have an area of 4 sq. units? Then make all the possible rectangles for areas of 5 -20 square units. What pattern(s) do you notice about the rectangles and the areas?