What is the Least Common Multiple of 21778 and 21790?

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 21778 and 21790 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21778 and 21790, than apply into the LCM equation.

GCF(21778,21790) = 2
LCM(21778,21790) = ( 21778 × 21790) / 2
LCM(21778,21790) = 474542620 / 2
LCM(21778,21790) = 237271310

Least Common Multiple (LCM) of 21778 and 21790 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21778 and 21790. First we will calculate the prime factors of 21778 and 21790.

Prime Factorization of 21778

Prime Factorization of 21790

Now multiplying the highest exponent prime factors to calculate the LCM of 21778 and 21790.

LCM(21778,21790) = 2¹ × 10889¹ × 5¹ × 2179¹
LCM(21778,21790) = 237271310