What is the Least Common Multiple of 21561 and 21579?

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 21561 and 21579 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21561 and 21579, than apply into the LCM equation.

GCF(21561,21579) = 3
LCM(21561,21579) = ( 21561 × 21579) / 3
LCM(21561,21579) = 465264819 / 3
LCM(21561,21579) = 155088273

Least Common Multiple (LCM) of 21561 and 21579 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21561 and 21579. First we will calculate the prime factors of 21561 and 21579.

Prime Factorization of 21561

Prime Factorization of 21579

Now multiplying the highest exponent prime factors to calculate the LCM of 21561 and 21579.

LCM(21561,21579) = 3¹ × 7187¹ × 7193¹
LCM(21561,21579) = 155088273