What is the Least Common Multiple of 21903 and 21910?

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 21903 and 21910 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21903 and 21910, than apply into the LCM equation.

GCF(21903,21910) = 7
LCM(21903,21910) = ( 21903 × 21910) / 7
LCM(21903,21910) = 479894730 / 7
LCM(21903,21910) = 68556390

Least Common Multiple (LCM) of 21903 and 21910 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21903 and 21910. First we will calculate the prime factors of 21903 and 21910.

Prime Factorization of 21903

Prime Factorization of 21910

Now multiplying the highest exponent prime factors to calculate the LCM of 21903 and 21910.

LCM(21903,21910) = 3¹ × 7² × 149¹ × 2¹ × 5¹ × 313¹
LCM(21903,21910) = 68556390