What is the Least Common Multiple of 42040 and 42056?

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 42040 and 42056 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 42040 and 42056, than apply into the LCM equation.

GCF(42040,42056) = 8
LCM(42040,42056) = ( 42040 × 42056) / 8
LCM(42040,42056) = 1768034240 / 8
LCM(42040,42056) = 221004280

Least Common Multiple (LCM) of 42040 and 42056 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 42040 and 42056. First we will calculate the prime factors of 42040 and 42056.

Prime Factorization of 42040

Prime Factorization of 42056

Now multiplying the highest exponent prime factors to calculate the LCM of 42040 and 42056.

LCM(42040,42056) = 2³ × 5¹ × 1051¹ × 7¹ × 751¹
LCM(42040,42056) = 221004280