title

public static int Gcd(int a, int b)
{
	return b == 0 ? a : Gcd(b, a % b);
}

public static int Gcds(params int[] nums)
{
	return nums.Aggregate(Gcd);
}

public static int Lcm(int a, int b)
{
	return a * b / Gcd(a, b);
}

public static int Lcms(params int[] nums)
{
	return nums.Aggregate(Lcm);
}