L.C.M. and ordered pairs

If the number of ordered pairs of positive integers ( a , b ) (a, b) such that the least common multiple of a a and b b is 2 5 . 5 11 . 1 1 17 2^5.5^{11}.11^{17} is A A , then find the sum of digits of A A .

Details and Assumptions

If the value of A is 3456 3456 , then you enter 3 + 4 + 5 + 6 = 18 3+4+5+6 = 18 as your answer.

You may use a calculator.


The answer is 26.

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1 solution

Abhay Sidhwani
Nov 8, 2014

MAX. ORDERED PAIR (a,b) is given by [2(x+1)-1] [2(y+1)-1] [2(z+1)-1] if a no. is expressed in form 2^x.5^y.11^z

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