Find the number of divisors of 1080 excluding the divisors which are perfect squares.	Choose the correct choice from the following answers
A) 28 B) 29 C) 30 D) 31 E) 32

Rationale: 1080 = 2 ^ 3 * 3 ^ 3 * 5 ^ 1 total no . of divisors = ( 3 + 1 ) * ( 3 + 1 ) * ( 1 + 1 ) = 32 only 4 divisors 1 , 2 ^ 2 = 4 , 3 ^ 2 = 9 & 2 ^ 2 * 3 ^ 2 = 36 are perfect squares so , number of divisors excluding perfect squares divisors = 32 - 4 = 28 answer : a
Answer: A