What is the Least Common Multiple of 21478 and 21490?

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 21478 and 21490 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21478 and 21490, than apply into the LCM equation.

GCF(21478,21490) = 2
LCM(21478,21490) = ( 21478 × 21490) / 2
LCM(21478,21490) = 461562220 / 2
LCM(21478,21490) = 230781110

Least Common Multiple (LCM) of 21478 and 21490 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21478 and 21490. First we will calculate the prime factors of 21478 and 21490.

Prime Factorization of 21478

Prime Factorization of 21490

Now multiplying the highest exponent prime factors to calculate the LCM of 21478 and 21490.

LCM(21478,21490) = 2¹ × 10739¹ × 5¹ × 7¹ × 307¹
LCM(21478,21490) = 230781110