What is the Least Common Multiple of 20639 and 20643?

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 20639 and 20643 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 20639 and 20643, than apply into the LCM equation.

GCF(20639,20643) = 1
LCM(20639,20643) = ( 20639 × 20643) / 1
LCM(20639,20643) = 426050877 / 1
LCM(20639,20643) = 426050877

Least Common Multiple (LCM) of 20639 and 20643 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 20639 and 20643. First we will calculate the prime factors of 20639 and 20643.

Prime Factorization of 20639

Prime Factorization of 20643

Now multiplying the highest exponent prime factors to calculate the LCM of 20639 and 20643.

LCM(20639,20643) = 20639¹ × 3¹ × 7¹ × 983¹
LCM(20639,20643) = 426050877