What is the Least Common Multiple of 42915 and 42930?

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 42915 and 42930 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 42915 and 42930, than apply into the LCM equation.

GCF(42915,42930) = 15
LCM(42915,42930) = ( 42915 × 42930) / 15
LCM(42915,42930) = 1842340950 / 15
LCM(42915,42930) = 122822730

Least Common Multiple (LCM) of 42915 and 42930 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 42915 and 42930. First we will calculate the prime factors of 42915 and 42930.

Prime Factorization of 42915

Prime Factorization of 42930

Now multiplying the highest exponent prime factors to calculate the LCM of 42915 and 42930.

LCM(42915,42930) = 3⁴ × 5¹ × 2861¹ × 2¹ × 53¹
LCM(42915,42930) = 122822730