Starting hand probabilities

In the probability tables in Brunson's Super System (page 572), it shows the probability of being dealt 2 aces is 0.45% with odds against as 220:1. 2 kings through 2 jacks 1.36% and 72.7:1 etc. (actually, I have another source somewhere that shows kings at 110:1 and Queens at 55:1 as I recall). My question is this: Why are the odds of getting two aces different from getting two kings (or any other pair) different?

The table does show, towards the bottom that any pair is 16:1 against- this makes sense since there are 4*4 possibilities, but what's with the 220:1? Thanks--