Problem 5 in Project Euler is this:

2520 is the smallest number that can be divided by each of the numbers from 1 to 10 without any remainder.

What is the smallest positive number that is evenly divisible by all of the numbers from 1 to 20?

The answer we are looking for is known as the Lowest Common Multiple(LCM), it is the smallest number which is a multiple of all these numbers. (more…)