What is the Least Common Multiple of 21898 and 21902?

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 21898 and 21902 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21898 and 21902, than apply into the LCM equation.

GCF(21898,21902) = 2
LCM(21898,21902) = ( 21898 × 21902) / 2
LCM(21898,21902) = 479609996 / 2
LCM(21898,21902) = 239804998

Least Common Multiple (LCM) of 21898 and 21902 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21898 and 21902. First we will calculate the prime factors of 21898 and 21902.

Prime Factorization of 21898

Prime Factorization of 21902

Now multiplying the highest exponent prime factors to calculate the LCM of 21898 and 21902.

LCM(21898,21902) = 2¹ × 10949¹ × 47¹ × 233¹
LCM(21898,21902) = 239804998