1) 6270:

6270 = 2 × 3 × 5 × 11 × 19

2) 8840:

8840 = 2 × 2 × 2 × 5 × 13 × 17

3) 10 450:

10 450 = 2 × 5 × 5 × 17 × 13

4) 13 986:

13 986 = 2 × 3 × 7 × 19 × 19

5) 16 400:

16 400 = 2 × 2 × 2 × 2 × 5 × 5 × 41

6) 20 010:

20 010 = 2 × 3 × 5 × 23 × 29