Which Week has an Opponent of san francisco 49ers?
CREATE TABLE table_name_46 (week INTEGER, opponent VARCHAR)
SELECT MAX(week) FROM table_name_46 WHERE opponent = "san francisco 49ers"
### Context: CREATE TABLE table_name_46 (week INTEGER, opponent VARCHAR) ### Question: Which Week has an Opponent of san francisco 49ers? ### Answer: SELECT MAX(week) FROM table_name_46 WHERE opponent = "san francisco 49ers"