What is the Least Common Multiple of 20421 and 20432?

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 20421 and 20432 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 20421 and 20432, than apply into the LCM equation.

GCF(20421,20432) = 1
LCM(20421,20432) = ( 20421 × 20432) / 1
LCM(20421,20432) = 417241872 / 1
LCM(20421,20432) = 417241872

Least Common Multiple (LCM) of 20421 and 20432 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 20421 and 20432. First we will calculate the prime factors of 20421 and 20432.

Prime Factorization of 20421

Prime Factorization of 20432

Now multiplying the highest exponent prime factors to calculate the LCM of 20421 and 20432.

LCM(20421,20432) = 3² × 2269¹ × 2⁴ × 1277¹
LCM(20421,20432) = 417241872