What is the Least Common Multiple of 39900 and 39905?

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 39900 and 39905 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 39900 and 39905, than apply into the LCM equation.

GCF(39900,39905) = 5
LCM(39900,39905) = ( 39900 × 39905) / 5
LCM(39900,39905) = 1592209500 / 5
LCM(39900,39905) = 318441900

Least Common Multiple (LCM) of 39900 and 39905 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 39900 and 39905. First we will calculate the prime factors of 39900 and 39905.

Prime Factorization of 39900

Prime Factorization of 39905

Now multiplying the highest exponent prime factors to calculate the LCM of 39900 and 39905.

LCM(39900,39905) = 2² × 3¹ × 5² × 7¹ × 19¹ × 23¹ × 347¹
LCM(39900,39905) = 318441900