What is the Least Common Multiple of 21885 and 21890?

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 21885 and 21890 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21885 and 21890, than apply into the LCM equation.

GCF(21885,21890) = 5
LCM(21885,21890) = ( 21885 × 21890) / 5
LCM(21885,21890) = 479062650 / 5
LCM(21885,21890) = 95812530

Least Common Multiple (LCM) of 21885 and 21890 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21885 and 21890. First we will calculate the prime factors of 21885 and 21890.

Prime Factorization of 21885

Prime Factorization of 21890

Now multiplying the highest exponent prime factors to calculate the LCM of 21885 and 21890.

LCM(21885,21890) = 3¹ × 5¹ × 1459¹ × 2¹ × 11¹ × 199¹
LCM(21885,21890) = 95812530