This is the complete list of proper factors of a certain number. 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 49, 84, 98, 147, 196, 294. What is the number? (Additional questions) List each of the factor pairs for the number. How is the list of factors pairs related to the rectangles that can be made for the factor pairs?