What is the Least Common Multiple of 21418 and 21430?

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 21418 and 21430 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21418 and 21430, than apply into the LCM equation.

GCF(21418,21430) = 2
LCM(21418,21430) = ( 21418 × 21430) / 2
LCM(21418,21430) = 458987740 / 2
LCM(21418,21430) = 229493870

Least Common Multiple (LCM) of 21418 and 21430 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21418 and 21430. First we will calculate the prime factors of 21418 and 21430.

Prime Factorization of 21418

Prime Factorization of 21430

Now multiplying the highest exponent prime factors to calculate the LCM of 21418 and 21430.

LCM(21418,21430) = 2¹ × 10709¹ × 5¹ × 2143¹
LCM(21418,21430) = 229493870