Factor Divisibility

You are given that the equation $81x+y=5130$ where x , y are nonnegative integers has 64 solutions, from $(x_{1},y_{1})$ to $(x_{64},y_{64})$ . Let $f(n)$ denote the number of factors of n which are divisible by 3 and $g(n)$ denote the number of factors of n which are not divisible by 3. What is $\displaystyle\sum_{i=1}^{64} \dfrac{f(y_{i})}{g(y_{i})}$ ?