You can find the greatest common divisor (GCD) using the Euclidean algorithm. See description here - The greatest common divisor of two integers.
If you knew GCD, you can find the least common multiple (LCM) easily
[a,b] - LCM,
(a,b) - GCD.
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- • The Greatest Common Divisor (GCD) and the Least Common Multiple (LCM) of several numbers
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- • Math section ( 290 calculators )
PLANETCALC, The greatest common divisor and the least common multiple of two integers