What is the Least Common Multiple of 21789 and 21808?

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 21789 and 21808 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21789 and 21808, than apply into the LCM equation.

GCF(21789,21808) = 1
LCM(21789,21808) = ( 21789 × 21808) / 1
LCM(21789,21808) = 475174512 / 1
LCM(21789,21808) = 475174512

Least Common Multiple (LCM) of 21789 and 21808 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21789 and 21808. First we will calculate the prime factors of 21789 and 21808.

Prime Factorization of 21789

Prime Factorization of 21808

Now multiplying the highest exponent prime factors to calculate the LCM of 21789 and 21808.

LCM(21789,21808) = 3⁴ × 269¹ × 2⁴ × 29¹ × 47¹
LCM(21789,21808) = 475174512