@Mr.Xcoder ÆD will take ⁸'s (x's) divisors, ḟ⁴ will filter y out of them, and then ÆD will vectorize and take the divisors of [1, 3], which are [[1], [1, 3]]
Jelly stringification then shows this as [1, [1, 3]]
@EriktheOutgolfer If I have a list (let's say [0, 0, 0, 1, 0], how could I turn that list into [0, 0, 0, 'a', 0]? If that's impossible/weird, I'm on the wrong track