What is the Least Common Multiple of 21216 and 21234?

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 21216 and 21234 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21216 and 21234, than apply into the LCM equation.

GCF(21216,21234) = 6
LCM(21216,21234) = ( 21216 × 21234) / 6
LCM(21216,21234) = 450500544 / 6
LCM(21216,21234) = 75083424

Least Common Multiple (LCM) of 21216 and 21234 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21216 and 21234. First we will calculate the prime factors of 21216 and 21234.

Prime Factorization of 21216

Prime Factorization of 21234

Now multiplying the highest exponent prime factors to calculate the LCM of 21216 and 21234.

LCM(21216,21234) = 2⁵ × 3¹ × 13¹ × 17¹ × 3539¹
LCM(21216,21234) = 75083424