# Problem 20 (a.k.a. Who knew how simple python could be?)

n! means n x (n - 1) ... 3 x 2 x 1For example, 10! = 10 x 9 ... 3 x 2 x 1 = 3628800, and the sum of the digits in the number 10! is 3 + 6 + 2 + 8 + 8 + 0 + 0 = 27.

Find the sum of the digits in the number 100!

This literally took a minute to write-up in python:

```
import math
def problem_20(target):
factorial_num = str(math.factorial(target))
sum = 0
for number in factorial_num:
sum += int(number)
return sum
print(problem_20(100))
```