Question

Help me pls

I put the picture in the attach file below
(Sorry i'm in secondary school but i have a problem with my settings)

Answer 1

1,2,4,8

Explanation:

1

2

1,2

4

4,1

4,2

4,2,1

8

8,1

8,2

8,2,1

8,4

8,4,1

8,4,2

8,4,2,1