What are some factor strings of 48?

The factor pairs are factor strings of length 2:

1 x 48, 2 x 24, 3 x 16, 4 x 12, 6 x 8

The prime factorization is the longest factor string, which has a length of 5:

2 x 2 x 2 x 2 x 3

There are other factor strings:

2 x 2 x 12

2 x 3 x 8

2 x 4 x 6

2 x 2 x 2 x 6

2 x 2 x 3 x 4