What is the Least Common Multiple of 21930 and 21946?

Least common multiple or lowest common denominator (lcd) can be calculated in two way; with the LCM formula calculation of greatest common factor (GCF), or multiplying the prime factors with the highest exponent factor.

Least Common Multiple of 21930 and 21946 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21930 and 21946, than apply into the LCM equation.

GCF(21930,21946) = 2
LCM(21930,21946) = ( 21930 × 21946) / 2
LCM(21930,21946) = 481275780 / 2
LCM(21930,21946) = 240637890

Least Common Multiple (LCM) of 21930 and 21946 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21930 and 21946. First we will calculate the prime factors of 21930 and 21946.

Prime Factorization of 21930

Prime Factorization of 21946

Now multiplying the highest exponent prime factors to calculate the LCM of 21930 and 21946.

LCM(21930,21946) = 2¹ × 3¹ × 5¹ × 17¹ × 43¹ × 10973¹
LCM(21930,21946) = 240637890