Folding AA ?
I think in this scenario it would come down to more of how well you now these players. You are obviously a favorite with AA in your hand so other than the prize equity which is something to seriously consider here are what I would consider are the other most important contributing factors:
your table image at the current time
the image or what you believe is the current approach of the other players as to how they will react or whether they will be playing back at you and
what you feel they will probably have in their hand to call your all-in with.
My assumption would be these must be very competent to very good players if they had made it this far and also that you had been playing with each one for at least several hours if not some of them a couple of days depending on which tourney we are talking. So with that in mind you should have a good "feel" for whether to pull the trigger or not.
Overall I feel you have the odds
in your favor and if you feel that in a 4 handed game that you will get 2 or less callers, preferably only 1 caller whether it be the chip leader or not I say fire away!!!
After all you are in it to win it right??!!? I know that between 1st and 4th it is a big swing but the other thing is all of the other players are well aware or should be of the prize equity factor and I am sure are taking it into account when they see you pull the trigger for your whole stack and how calling it will obviously directly affect thiers!!! To me the above factors should weigh in heavy when they go to make that call!!! You basically forcing them to make that big decision and that could knock them out or take a big chunk of their stack as well and and drop their prize amount along with it!
Even though the exact math in this situation may very well say otherwise I always feel poker in general is alot more than the math and in this move these things are a must to consider!!!