If I counted right, the states/territories will send 111 unpledged delegates to the Republican convention.

If some of those caucus states join Colorado that number will go up.

Trump needs something like 1237 pledged delegates. If the RNC really wants to keep him at bay, they will need to get some of those other states to do exactly what Colorado did, and then manipulate the delegates on the floor. They will also need to help the remaining 4 other candidates to stay in the race and drain delegates away from Trump in proportional primary states.