The number of proper divisors of 2^(p)*6...

The number of proper divisors of `2^(p)6^(q)21^(r),AA p,q,r in N`, is

A

(a) (p+q+1)(q+r+1)(r+1)

B

(b) (p+q+1)(q+r+1)(r+1)-2

C

(c) (p+q)(q+r)r-2

D

(d) (p+q)(q+r)r

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The correct Answer is:

B

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