What is the Least Common Multiple of 21821 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 21821 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 21821 and 21838, than apply into the LCM equation.

GCF(21821,21838) = 1
LCM(21821,21838) = ( 21821 × 21838) / 1
LCM(21821,21838) = 476526998 / 1
LCM(21821,21838) = 476526998

Least Common Multiple (LCM) of 21821 and 21838 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21821 and 21838. First we will calculate the prime factors of 21821 and 21838.

Prime Factorization of 21821

Prime Factorization of 21838

Now multiplying the highest exponent prime factors to calculate the LCM of 21821 and 21838.

LCM(21821,21838) = 21821¹ × 2¹ × 61¹ × 179¹
LCM(21821,21838) = 476526998