What is the Least Common Multiple of 21558 and 21570?

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 21558 and 21570 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21558 and 21570, than apply into the LCM equation.

GCF(21558,21570) = 6
LCM(21558,21570) = ( 21558 × 21570) / 6
LCM(21558,21570) = 465006060 / 6
LCM(21558,21570) = 77501010

Least Common Multiple (LCM) of 21558 and 21570 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21558 and 21570. First we will calculate the prime factors of 21558 and 21570.

Prime Factorization of 21558

Prime Factorization of 21570

Now multiplying the highest exponent prime factors to calculate the LCM of 21558 and 21570.

LCM(21558,21570) = 2¹ × 3¹ × 3593¹ × 5¹ × 719¹
LCM(21558,21570) = 77501010