What is the Least Common Multiple of 21787 and 21806?

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 21787 and 21806 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21787 and 21806, than apply into the LCM equation.

GCF(21787,21806) = 1
LCM(21787,21806) = ( 21787 × 21806) / 1
LCM(21787,21806) = 475087322 / 1
LCM(21787,21806) = 475087322

Least Common Multiple (LCM) of 21787 and 21806 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21787 and 21806. First we will calculate the prime factors of 21787 and 21806.

Prime Factorization of 21787

Prime Factorization of 21806

Now multiplying the highest exponent prime factors to calculate the LCM of 21787 and 21806.

LCM(21787,21806) = 21787¹ × 2¹ × 10903¹
LCM(21787,21806) = 475087322