Replace prefix string from lines in a file, and put into a bash array

In the file groupAfiles.txt are the lines: file14 file2 file4 file9 I need a way to convert them to remove file and add /dev/loop and put them all in one line with a space between them. /dev/loop14 /dev/loop2 /dev/loop4 /dev/loop9 Then I need to put this in an array. (but the numbers change) How do I do this?