What is the Least Common Multiple of 21818 and 21838?

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 21818 and 21838 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21818 and 21838, than apply into the LCM equation.

GCF(21818,21838) = 2
LCM(21818,21838) = ( 21818 × 21838) / 2
LCM(21818,21838) = 476461484 / 2
LCM(21818,21838) = 238230742

Least Common Multiple (LCM) of 21818 and 21838 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21818 and 21838. First we will calculate the prime factors of 21818 and 21838.

Prime Factorization of 21818

Prime Factorization of 21838

Now multiplying the highest exponent prime factors to calculate the LCM of 21818 and 21838.

LCM(21818,21838) = 2¹ × 10909¹ × 61¹ × 179¹
LCM(21818,21838) = 238230742