For a positive integer n, let f(n) be the function that computes the sum of all positive divisors of n, divided by n. For example, f(14) = (1+2+7+14) ÷ 14 = 12/7. What is f(6) – f(8)?
really? Just plug and chug ...
(1+2+3+6)/6 - (1+2+4+8)/8 = ____
(1+2+3+6)/6 - (1+2+4+8)/8 = ____