What is the Least Common Multiple of 20105 and 20109?

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 20105 and 20109 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 20105 and 20109, than apply into the LCM equation.

GCF(20105,20109) = 1
LCM(20105,20109) = ( 20105 × 20109) / 1
LCM(20105,20109) = 404291445 / 1
LCM(20105,20109) = 404291445

Least Common Multiple (LCM) of 20105 and 20109 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 20105 and 20109. First we will calculate the prime factors of 20105 and 20109.

Prime Factorization of 20105

Prime Factorization of 20109

Now multiplying the highest exponent prime factors to calculate the LCM of 20105 and 20109.

LCM(20105,20109) = 5¹ × 4021¹ × 3¹ × 6703¹
LCM(20105,20109) = 404291445