also remember, before you make any action, have a plan for how you will respond to subsequent actions from others. If you are wanting to get all in here with AQs and a 21xBB stack (I certainly would), you would insta-call the shove(s). It sounds like you saw a big hand so made an auto raise, without really thinking about what happens next (hence why you are asking the question). If your plan was to try and steal but then fold to a shove, 2.5x is much cheaper..... but then also you would be turning a premium hand into a bluff.
My line here would probably have been min-raise (or min plus a chip), and hope that either of the blinds senses weakness and 3-bets so I can get all in.