Elias Sports Bureau settled the argument this week with a chart showing the 49ers, but not the Raiders, among teams with the most division titles in the Super Bowl era.
Most Division Titles, Super Bowl era
I went through the Pro Football Reference franchise pages and counted 17 division titles for the Raiders since the 1966 season. They currently lead the AFC West, so an 18th could be on the way.
Winning a division title has become easier, in theory, since the NFL realigned into eight four-team divisions beginning with the 2002 season.