How many factors of 660 are odd numbers greater than 1?  Choose the most appropriate option.
A) 3 B) 4 C) 5 D) 6 E) 15
When factorized, 660 has 5 prime factors. Of these prime factors 4 are odd and 1 is even. Hence total number of odd factors is 2*2*2*2(16), which includes 1. The total number of odd factors greater than 1 are 15.(option 15)
<result>E</result>
How many factors of 660 are odd numbers greater than 1?