What is the Least Common Multiple of 42305 and 42320?

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 42305 and 42320 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 42305 and 42320, than apply into the LCM equation.

GCF(42305,42320) = 5
LCM(42305,42320) = ( 42305 × 42320) / 5
LCM(42305,42320) = 1790347600 / 5
LCM(42305,42320) = 358069520

Least Common Multiple (LCM) of 42305 and 42320 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 42305 and 42320. First we will calculate the prime factors of 42305 and 42320.

Prime Factorization of 42305

Prime Factorization of 42320

Now multiplying the highest exponent prime factors to calculate the LCM of 42305 and 42320.

LCM(42305,42320) = 5¹ × 8461¹ × 2⁴ × 23²
LCM(42305,42320) = 358069520