If they have no prime factors in common, the LCM of w and y is their product.
If the GCF of w and Y is 1, multiply them together.
The least common multiple of two primes x and y, is x * y.
That would depend on the value of Y.
That would depend on what integer Y stands for.
The least common multiple (LCM) refers to a multiple that is COMMON to two or more numbers. You have only one number in the question! The least multiple of a number is itself.