I'm not sure why this surprised me, but if Ohio State wins the national championship, it will be only the sixth national championship for the B1G in the "big 4" college sports that the Power 5 conferences compete in (Football, MBB, WBB, Baseball) since 1990. (FB - Ohio State (2002, 2014) and Michigan (1997 - shared); MBB - Michigan State (2000); and WBB - Purdue (1999)).
How does that compare with the other Power 5 conferences?
SEC: 39 National Titles (FB - Alabama (1992, 2009, 2011, 2012, 2015, 2017), Florida (1996, 2006, 2008), Tennessee (1998), LSU (2003, 2007, 2019), and Auburn (2010); MBB - Arkansas (1994), Kentucky (1996, 1998, 2012), and Florida (2006, 2007); WBB - Tennessee (1991, 1996, 1997, 1998, 2007, 2008) and USC (2017); Baseball - Georgia (1990), LSU (1991, 1993, 1996, 1997, 2000, 2009), USC (2010, 2011), Vanderbilt (2014, 2019), and Florida (2017))
ACC: 20 National Titles (FB - Florida State (1993, 1999, 2013) and Clemson (2016, 2018); MBB - Duke (1991, 1992, 2001, 2010, 2015), North Carolina (1993, 2005, 2009, 2017), Maryland (2002), and Virginia (2019); WBB - North Carolina (1994), Maryland (2006), and Notre Dame (2018); Baseball - Virginia (2015))
Big 12: 15 National Titles (FB - Colorado (1990 - shared), Nebraska (1994, 1995, 1997 - shared), Oklahoma (2000), and Texas (2005); MBB - Kansas (2008); WBB - Texas Tech (1993), Baylor (2005, 2012, 2019), and Texas A&M (2011); Baseball - Oklahoma (1994) and Texas (2002, 2005))
Pac-12: 13 National Titles (FB - Washington (1991 - shared) and USC (2003, 2004); MBB - UCLA (1995) and Arizona (1997); WBB - Stanford (1990, 1992); Baseball - USC (1998), Oregon State (2006, 2007, 2018), Arizona (2012), UCLA (2013))