What is the Least Common Multiple of 42170 and 42181?

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 42170 and 42181 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 42170 and 42181, than apply into the LCM equation.

GCF(42170,42181) = 1
LCM(42170,42181) = ( 42170 × 42181) / 1
LCM(42170,42181) = 1778772770 / 1
LCM(42170,42181) = 1778772770

Least Common Multiple (LCM) of 42170 and 42181 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 42170 and 42181. First we will calculate the prime factors of 42170 and 42181.

Prime Factorization of 42170

Prime Factorization of 42181

Now multiplying the highest exponent prime factors to calculate the LCM of 42170 and 42181.

LCM(42170,42181) = 2¹ × 5¹ × 4217¹ × 42181¹
LCM(42170,42181) = 1778772770