How many unordered pairs (a b) of positi...

How many unordered pairs (a b) of positive integers a and b are there such that lcm (a, b) = 1,26,000? (Note: An unordered pair fa, b) means a, b) {b, a

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LCM(126000)=`10^3*2*7*9`
`=2^4*3^2*5^3*7`
Patterns=(1*(2)*(1*4)*(1*3)*(1*5)
=2*4*3*5=120.

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