Find Closest Factorization

Given y, finds x1 and x2 such that x1*x2 = y and |x1-x2| is minimized.

Given an input integer, this simple function returns two of its factors (also integers) such that the product of these factors equals the input and the factors are as close as possible.
Non-integer input will be rounded to the nearest integer.

Examples:
FindClosestFactorization(12) = [3 4]
FindClosestFactorization(39) = [3 13]
FindClosestFactorization(4) = [2 2]
FindClosestFactorization(7) = [1 7]