Project Euler 5: Building the Smallest Number Divisible by 1 to 20 from Least Common Multiples
Build the smallest number divisible by 1 to 20 by folding lcm(a, b) = a / gcd(a, b) × b with Euclid's algorithm, plus a correctness proof, overflow notes, and C++17 and Python 3 code.
Project Euleralgorithmsmathleast common multiple