14-C01P03

C01P03 - Factorial digits

Implement a function fact_digits(n), that takes an integer and returns the sum of the factorials of each digit of n.

For example, if n = 145, we want 1! + 4! + 5!.

Here's the signature:

def fact_digits(n):
    pass

Examples:

fact_digits(101) == 3
fact_digits(111) == 3
fact_digits(145) == 145
fact_digits(999) == 1088640

Hints:

We've already solved a similiar problem. Think how you can use that to your advantage.