Q.

If p, q, r, s, t be distinct primes and N=pq2r3st, then

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a

N can be written as a product of two positive integers in 48 ways

b

N can not be divisible by 13!

c

N has 96 positive divisors

d

N can be written as a product of two positive integers in 96 ways

answer is A, C, D.

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Detailed Solution

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No. of divisors =(1+1)(2+1)(3+1)(1+1)(1+1)=96

Since there are 6 primes which are 13 and N contain only five distinct primes, N cannot be div. By 13!.

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