What is the Least Common Multiple of 21447 and 21457?

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 21447 and 21457 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21447 and 21457, than apply into the LCM equation.

GCF(21447,21457) = 1
LCM(21447,21457) = ( 21447 × 21457) / 1
LCM(21447,21457) = 460188279 / 1
LCM(21447,21457) = 460188279

Least Common Multiple (LCM) of 21447 and 21457 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21447 and 21457. First we will calculate the prime factors of 21447 and 21457.

Prime Factorization of 21447

Prime Factorization of 21457

Now multiplying the highest exponent prime factors to calculate the LCM of 21447 and 21457.

LCM(21447,21457) = 3² × 2383¹ × 43¹ × 499¹
LCM(21447,21457) = 460188279