Least Common Multiple Calculator Least Common Multiple (LCM) Calculator Enter positive integers (comma, space or newline separated) Calculate LCM Clear Copy Result Download CSV Input rules: integers >= 1. Decimal or zero values will be rejected. Large integers supported (JS integer limits apply). Options Show step-by-step Yes — show prime factorizations No — show only final LCM Computation Mode Pairwise GCD-based (recommended) Prime-factor merge Notes:
