What is the Least Common Multiple of 21538 and 21542?

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 21538 and 21542 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21538 and 21542, than apply into the LCM equation.

GCF(21538,21542) = 2
LCM(21538,21542) = ( 21538 × 21542) / 2
LCM(21538,21542) = 463971596 / 2
LCM(21538,21542) = 231985798

Least Common Multiple (LCM) of 21538 and 21542 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21538 and 21542. First we will calculate the prime factors of 21538 and 21542.

Prime Factorization of 21538

Prime Factorization of 21542

Now multiplying the highest exponent prime factors to calculate the LCM of 21538 and 21542.

LCM(21538,21542) = 2¹ × 11² × 89¹ × 10771¹
LCM(21538,21542) = 231985798