填空题 .
16.  What are the prime divisors of 100?
  
100=(22)(52), so the prime divisors are 2 and 5.
 
17.  What are the prime divisors of 144?
  
144=(24)(32), so the prime divisors are 2 and 3.
 
填空题 16.  What are the prime divisors of 100?
填空题 17.  What are the prime divisors of 144?