What is the Least Common Multiple of 20221 and 20228?

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 20221 and 20228 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 20221 and 20228, than apply into the LCM equation.

GCF(20221,20228) = 1
LCM(20221,20228) = ( 20221 × 20228) / 1
LCM(20221,20228) = 409030388 / 1
LCM(20221,20228) = 409030388

Least Common Multiple (LCM) of 20221 and 20228 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 20221 and 20228. First we will calculate the prime factors of 20221 and 20228.

Prime Factorization of 20221

Prime Factorization of 20228

Now multiplying the highest exponent prime factors to calculate the LCM of 20221 and 20228.

LCM(20221,20228) = 73¹ × 277¹ × 2² × 13¹ × 389¹
LCM(20221,20228) = 409030388