Which set of numbers correctly shows all of the factors of 28

The factors are 1,2,4,8,16,32

All the prime factors are:

1, 2 (28/2=14), 2, (14/2=7) and 7.

all the factors are combinations of those, smaller or equal to than the number itself so:

1,2,4,7,14,28

so choose an answer (I assumed there were some options) that has all of those and only those numbers!)