The number of electors a state has in the electoral college is?

According to Article Two, Section 1, Clause 1:

"Each State shall appoint, in such Manner as the Legislature thereof may direct, a Number of Electors, equal to the whole Number of Senators and Representatives to which the State may be entitled in the Congress: but no Senator or Representative, or Person holding an Office of Trust or Profit under the United States, shall be appointed an Elector."

Thus, the number is equal to the sum of the Representatives and Senators for that state.

Under the 23rd Amendment, the District of Columbia is given a number of electors equal to the lessor of (a) if it were a state OR (b) the fewest electors given to any other existing state. Currently, D.C. gets 3 electors.