Provide your best answer for the following math problem. Give ONLY the answer, no other words or explanation.
For example:

Answer: <most likely answer, as short as possible; not a complete sentence, just the answer!>.

The problem is: how many integers are divisible by 2 between 10 ! and 10 ! + 20 inclusive ?
21
1995 * (5 + 1) / 2.