Massaging output of 50g's FACTORS command

[Peter Murphy]

For a value or expression, FACTORS returns a list of prime factors and their multiplicities: 1944 FACTORS returns {3 5. 2 3.}, for example.

How can I split that list into two, one {3 2} a list of the prime factors and the other {5. 3.} a list of their respective multiplicities? Some little RPL program will presumably do it.

This should be a few seconds' worth of fun for someone!