(a) How many divisors are there of the number \( x=21600 \). Find also the sum of these divisors...

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(a) How many divisors are there of the number \( x=21600 \). Find also the sum of these divisors.
(b) In how many ways the number 7056 can be resolved as a product of 2 factors.
(c) Find the number of ways in which the number 300300 can be split into 2 factors which are relatively prime.
(d) Find the number of positive integers that are divisors of atleast one of the numbers \( 10^{10} ; 15^{7} ; 18^{11} \).
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