What is the Least Common Multiple of 21991 and 22000?

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 21991 and 22000 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21991 and 22000, than apply into the LCM equation.

GCF(21991,22000) = 1
LCM(21991,22000) = ( 21991 × 22000) / 1
LCM(21991,22000) = 483802000 / 1
LCM(21991,22000) = 483802000

Least Common Multiple (LCM) of 21991 and 22000 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21991 and 22000. First we will calculate the prime factors of 21991 and 22000.

Prime Factorization of 21991

Prime Factorization of 22000

Now multiplying the highest exponent prime factors to calculate the LCM of 21991 and 22000.

LCM(21991,22000) = 21991¹ × 2⁴ × 5³ × 11¹
LCM(21991,22000) = 483802000