Each state is entitled to how many electors?

It varies by state. The minimum for a state is three but there is no maximum limit; California has the most with 55 (as of 2012).

The number is determined by the number of people the state sends to Congress. So the number will be based on:

1. The number of Senators a state has- everystate has exactly two.

2. The number of Representatives a state has. This is based on the number of people who live in the state, but every state is guaranteed to have at least one.