What is the Least Common Multiple of 42904 and 42920?

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 42904 and 42920 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 42904 and 42920, than apply into the LCM equation.

GCF(42904,42920) = 8
LCM(42904,42920) = ( 42904 × 42920) / 8
LCM(42904,42920) = 1841439680 / 8
LCM(42904,42920) = 230179960

Least Common Multiple (LCM) of 42904 and 42920 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 42904 and 42920. First we will calculate the prime factors of 42904 and 42920.

Prime Factorization of 42904

Prime Factorization of 42920

Now multiplying the highest exponent prime factors to calculate the LCM of 42904 and 42920.

LCM(42904,42920) = 2³ × 31¹ × 173¹ × 5¹ × 29¹ × 37¹
LCM(42904,42920) = 230179960