How many factors of 990 are odd numbers greater than 1?
Choose the correct answer.
A) 13
B) 14
C) 15
D) 16
E) 17
When factorized, 990 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>C</result>
How many factors of 990 are odd numbers greater than 1?