What is the Least Common Multiple of 42620 and 42638?

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 42620 and 42638 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 42620 and 42638, than apply into the LCM equation.

GCF(42620,42638) = 2
LCM(42620,42638) = ( 42620 × 42638) / 2
LCM(42620,42638) = 1817231560 / 2
LCM(42620,42638) = 908615780

Least Common Multiple (LCM) of 42620 and 42638 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 42620 and 42638. First we will calculate the prime factors of 42620 and 42638.

Prime Factorization of 42620

Prime Factorization of 42638

Now multiplying the highest exponent prime factors to calculate the LCM of 42620 and 42638.

LCM(42620,42638) = 2² × 5¹ × 2131¹ × 21319¹
LCM(42620,42638) = 908615780