What is the Least Common Multiple of 42609 and 42615?

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 42609 and 42615 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 42609 and 42615, than apply into the LCM equation.

GCF(42609,42615) = 3
LCM(42609,42615) = ( 42609 × 42615) / 3
LCM(42609,42615) = 1815782535 / 3
LCM(42609,42615) = 605260845

Least Common Multiple (LCM) of 42609 and 42615 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 42609 and 42615. First we will calculate the prime factors of 42609 and 42615.

Prime Factorization of 42609

Prime Factorization of 42615

Now multiplying the highest exponent prime factors to calculate the LCM of 42609 and 42615.

LCM(42609,42615) = 3² × 7¹ × 2029¹ × 5¹ × 947¹
LCM(42609,42615) = 605260845