What is the Least Common Multiple of 490 and 505?

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 505 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 505, than apply into the LCM equation.

GCF(490,505) = 5
LCM(490,505) = ( 490 × 505) / 5
LCM(490,505) = 247450 / 5
LCM(490,505) = 49490

Least Common Multiple (LCM) of 490 and 505 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 490 and 505. First we will calculate the prime factors of 490 and 505.

Prime Factorization of 490

Prime Factorization of 505

Now multiplying the highest exponent prime factors to calculate the LCM of 490 and 505.

LCM(490,505) = 2¹ × 5¹ × 7² × 101¹
LCM(490,505) = 49490