[k|k<-[1...floor(sqrt 10)],rem 10 k<1]

f n=[k|k<-[1...floor(sqrt n)],rem n k<1]

f 10

No instance for (Floating t0) arising from a use of `it'
The type variable `t0' is ambiguous
Note: there are several potential instances:
  instance Floating Double -- Defined in `GHC.Float'
  instance Floating Float -- Defined in `GHC.Float'
In the first argument of `print', namely `it'
In a stmt of an interactive GHCi command: print it

f :: (Floating t, Integral t, RealFrac t) => t -> [t]