#APL+WIN, 32 bytes

m,[.1]n÷m←(0=m|n)/m←1↓⍳⌊(n←⎕)*.5

Explanation:

(n←⎕) Prompts for screen input
m←(0=m|n)/m←1↓⍳⌊(n←⎕)*.5 Calculates the factors dropping the first
m,[.1]n÷ Identifies the pairs and concatenates into a list.

APL+WIN, 32 bytes

m,[.1]n÷m←(0=m|n)/m←1↓⍳⌊(n←⎕)*.5

Explanation:

(n←⎕) Prompts for screen input
m←(0=m|n)/m←1↓⍳⌊(n←⎕)*.5 Calculates the factors dropping the first
m,[.1]n÷ Identifies the pairs and concatenates into a list.