Indiana struggles to fill it's 16K arena, over the past 10 years it has rarely been able to average even 16K. No way they could ever draw what Syracuse does routinely.
Kansas does a much better job consistently filling their 16K arena. Hard to say what they would draw if they had a Carrier Dome to play in. It would surely be more than Indiana.
Carolina's holds 21K. They almost never approach that number, and their average attendance in recent years is often below 20K, even dropping into the 17K range. I can't see them coming close to the numbers SU does.
Even Kentucky's average attendance ranges from year to year from 22K to 24K. While a lot of the variance has to do with the amount of fraud they need to commit to win the attendance crown from Syracuse, they still struggle to consistently fill their relatively small arena (compared to a 35K arena, 23K is small). They might, might not. Never underestimate the willingness of that university to cheat to win something.