What is the Least Common Multiple of 42005 and 42018?

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 42005 and 42018 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 42005 and 42018, than apply into the LCM equation.

GCF(42005,42018) = 1
LCM(42005,42018) = ( 42005 × 42018) / 1
LCM(42005,42018) = 1764966090 / 1
LCM(42005,42018) = 1764966090

Least Common Multiple (LCM) of 42005 and 42018 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 42005 and 42018. First we will calculate the prime factors of 42005 and 42018.

Prime Factorization of 42005

Prime Factorization of 42018

Now multiplying the highest exponent prime factors to calculate the LCM of 42005 and 42018.

LCM(42005,42018) = 5¹ × 31¹ × 271¹ × 2¹ × 3¹ × 47¹ × 149¹
LCM(42005,42018) = 1764966090