Find the number of pairs of positive integers (a,b)(a, b)(a,b) such that LCM(a,b)=105\text{LCM}(a, b) = 10^5LCM(a,b)=105 and GCD(a,b)=10\text{GCD}(a, b) = 10GCD(a,b)=10.
2
4
8
16