What is the Least Common Multiple of 21792 and 21809?

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 21792 and 21809 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21792 and 21809, than apply into the LCM equation.

GCF(21792,21809) = 1
LCM(21792,21809) = ( 21792 × 21809) / 1
LCM(21792,21809) = 475261728 / 1
LCM(21792,21809) = 475261728

Least Common Multiple (LCM) of 21792 and 21809 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21792 and 21809. First we will calculate the prime factors of 21792 and 21809.

Prime Factorization of 21792

Prime Factorization of 21809

Now multiplying the highest exponent prime factors to calculate the LCM of 21792 and 21809.

LCM(21792,21809) = 2⁵ × 3¹ × 227¹ × 113¹ × 193¹
LCM(21792,21809) = 475261728