Actually there are 18 you missed Texas A&M and UCLA, ...
Kansas plays Missouri and Texas.
Missouri plays Kansas and Texas.
Texas A&M plays only Texas.
So of course Texas plays Kansas and Missouri and Texas A&M.
HOWEVER with the championship game there can still only be one undefeated.
South Florida plays Cincinnati and vice versa.
So one possible undefeated here.
Iowa plays both Michigan and Wisconsin.
Michigan plays Iowa and Wisconsin.
So obviously Wisconsin plays Iowa and Michigan.
Only one undefeated possible out of this group.
UH has no undefeated teams on their schedule so they could run the table without ruining anyone else s potentially perfect season.
TCU is in the same boat
UCLA also faces no undefeated opponents.
Neither does Boise St.
So there are four potential undefeated teams in this group.
Amongst, Auburn, Alabama, Florida, and LSU there can only potentially be one undefeated since there is an actual championship game.
So all in all there can be a maximum of 8 undefeated teams at the end of the regular season and conference championship games. I am betting there will be somewhere between 0 and 3 though.