What is the Least Common Multiple of 478 and 490?

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 478 and 490 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 478 and 490, than apply into the LCM equation.

GCF(478,490) = 2
LCM(478,490) = ( 478 × 490) / 2
LCM(478,490) = 234220 / 2
LCM(478,490) = 117110

Least Common Multiple (LCM) of 478 and 490 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 478 and 490. First we will calculate the prime factors of 478 and 490.

Prime Factorization of 478

Prime Factorization of 490

Now multiplying the highest exponent prime factors to calculate the LCM of 478 and 490.

LCM(478,490) = 2¹ × 239¹ × 5¹ × 7²
LCM(478,490) = 117110