What is the Least Common Multiple of 20872 and 20890?

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 20872 and 20890 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 20872 and 20890, than apply into the LCM equation.

GCF(20872,20890) = 2
LCM(20872,20890) = ( 20872 × 20890) / 2
LCM(20872,20890) = 436016080 / 2
LCM(20872,20890) = 218008040

Least Common Multiple (LCM) of 20872 and 20890 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 20872 and 20890. First we will calculate the prime factors of 20872 and 20890.

Prime Factorization of 20872

Prime Factorization of 20890

Now multiplying the highest exponent prime factors to calculate the LCM of 20872 and 20890.

LCM(20872,20890) = 2³ × 2609¹ × 5¹ × 2089¹
LCM(20872,20890) = 218008040