Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Game | Date | Opponent | Result | Falcons points | Opponents | Record | Attendance |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1.0 | Sept. 3 | Houston Oilers | Win | 20.0 | 14.0 | 1-0 | 57328.0 |
| 2.0 | Sept. 10 | at Los Angeles Rams | Loss | 0.0 | 10.0 | 1-1 | 46201.0 |
| 3.0 | Sept. 17 | Cleveland Browns | Loss | 16.0 | 24.0 | 1-2 | 56648.0 |
| 4.0 | Sept. 24 | at Tampa Bay Buccaneers | Loss | 9.0 | 14.0 | 1-3 | 58073.0 |
| 5.0 | Oct. 1 | New York Giants | Win | 23.0 | 20.0 | 2-3 | 47765.0 |
| 6.0 | Oct. 8 | at Pittsburgh Steelers | Loss | 7.0 | 31.0 | 2-4 | 48202.0 |
| 7.0 | Oct. 15 | Detroit Lions | Win | 14.0 | 0.0 | 3-4 | 51172.0 |
| 8.0 | Oct. 22 | at San Francisco 49ers | Win | 20.0 | 17.0 | 4-4 | 44235.0 |
| 9.0 | Oct. 30 | Los Angeles Rams | Win | 15.0 | 7.0 | 5-4 | 57250.0 |
| 10.0 | Nov. 5 | San Francisco 49ers | Win | 21.0 | 10.0 | 6-4 | 55468.0 |
| 11.0 | Nov. 12 | at New Orleans Saints | Win | 20.0 | 17.0 | 7-4 | 70323.0 |
| 12.0 | Nov. 19 | at Chicago Bears | Loss | 7.0 | 13.0 | 7-5 | 46022.0 |
| 13.0 | Nov. 26 | New Orleans Saints | Win | 20.0 | 17.0 | 8-5 | 55121.0 |
| 14.0 | Dec. 3 | at Cincinnati Bengals | Loss | 7.0 | 37.0 | 8-6 | 25336.0 |
| 15.0 | Dec. 10 | Washington Redskins | Win | 20.0 | 17.0 | 9-6 | 54176.0 |
Question:
In games where the opponent was the San Francisco 49ers what was the minimum amount of points scored?
Answer:
21.0