Try Number Explorer on Visnos.com for a great visualization of division as well as factor-pairs, prime-factors, and division tests.

 Number Explorer is a great site for visualization of division. As you can see in the embedded picture below you will be presented with the division problem of 36/5.

• You can easily adjust the division problem to what you would like - just make sure you select the check next to the number. 
• You can show the numbers as well by clicking on the icon underneath of the die that says show numbers.
• You can change it from balls to fish or cards
• Change the mode to factor-pairs
• see the factor pairs for the number you chose
• this is so helpful for students to see this visualized

Embedded below is a 2 minute and 14 second YouTube tutorial.

Take care,

Brad