Find all the numbers, which will divide exactly into 12?

Example:  1,  2,  3,  4,  6 and 12.

v      Investigate other numbers.

  Consider 

v      Which numbers  have lots of factors and which only have a few.

 v      What is the smallest number of factors any number can have?

     Find more of these.

 v      Can you find quick methods of obtaining factors, example does 217 have a factor?  What are they?