What is the Least Common Multiple of 42001 and 42005?

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 42001 and 42005 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 42001 and 42005, than apply into the LCM equation.

GCF(42001,42005) = 1
LCM(42001,42005) = ( 42001 × 42005) / 1
LCM(42001,42005) = 1764252005 / 1
LCM(42001,42005) = 1764252005

Least Common Multiple (LCM) of 42001 and 42005 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 42001 and 42005. First we will calculate the prime factors of 42001 and 42005.

Prime Factorization of 42001

Prime Factorization of 42005

Now multiplying the highest exponent prime factors to calculate the LCM of 42001 and 42005.

LCM(42001,42005) = 97¹ × 433¹ × 5¹ × 31¹ × 271¹
LCM(42001,42005) = 1764252005