What is the Least Common Multiple of 490 and 496?

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 490 and 496 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 490 and 496, than apply into the LCM equation.

GCF(490,496) = 2
LCM(490,496) = ( 490 × 496) / 2
LCM(490,496) = 243040 / 2
LCM(490,496) = 121520

Least Common Multiple (LCM) of 490 and 496 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 490 and 496. First we will calculate the prime factors of 490 and 496.

Prime Factorization of 490

Prime Factorization of 496

Now multiplying the highest exponent prime factors to calculate the LCM of 490 and 496.

LCM(490,496) = 2⁴ × 5¹ × 7² × 31¹
LCM(490,496) = 121520