Currently the 49ers are two games out of first place. In two weeks they could be in a four way tie for first place.
This week the 49ers and Rams match up in San Francisco. The Cardinals travel to Seattle to take on a reeling Seahawks team. If the 49ers and Cardinals win then the 49ers will be one game back with the other three teams at 4-5.
Next week the 49ers take on an overrated Buccaneers team at home. The Rams take on the Falcons at home, the Seahawks play at New Orleans, and Arizona plays at Kansas City. If the 49ers win a very winnable game and the other three lose against better opponents, there will be a 4 way tie in the putrid NFC West at 4-6. If this happens, it wont be out of the question for a 7-9 team to win this division.
Barrow's article on each NFC West teams remaining schedule