What is the Least Common Multiple of 39905 and 39921?

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 39905 and 39921 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 39905 and 39921, than apply into the LCM equation.

GCF(39905,39921) = 1
LCM(39905,39921) = ( 39905 × 39921) / 1
LCM(39905,39921) = 1593047505 / 1
LCM(39905,39921) = 1593047505

Least Common Multiple (LCM) of 39905 and 39921 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 39905 and 39921. First we will calculate the prime factors of 39905 and 39921.

Prime Factorization of 39905

Prime Factorization of 39921

Now multiplying the highest exponent prime factors to calculate the LCM of 39905 and 39921.

LCM(39905,39921) = 5¹ × 23¹ × 347¹ × 3¹ × 7¹ × 1901¹
LCM(39905,39921) = 1593047505