How many whole number divisors does the number 2009 have

Question

I'm studying for a math competition 

Answer 1

Hi Caitlyn,

 

The prime factors of 2009 are 1, 7, 7 and 41.  Then, of course there's 2009.

 

So your whole number divisors are

1

7

41

49

287

2009

 

 

 

Answer 2

The prime factorization:

 

2009 = 7² · 41

 

2009 has two unique whole number divisors.