Write a function that returns the least common multiple (LCM) of two integers.
Examples
lcm(9, 18) ➞ 18
lcm(8, 5) ➞ 40
lcm(17, 11) ➞ 187
Notes
- Both values will be positive.
- The LCM is the smallest integer that is divisible by both numbers such that the remainder is zero.