How many positive divisors does 75600 have? How many odd divisors? Point out the ideas, thank you!

How many positive divisors does 75600 have? How many odd divisors? Point out the ideas, thank you!

75600=2^4 *3^3*5^2*7
Positive divisor = (4 + 1) * (3 + 1) * (2 + 1) * (1 + 1) = 120
Odd divisor = (3 + 1) * (2 + 1) * (1 + 1) = 24