What is the Least Common Multiple of 20490 and 20505?

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 20490 and 20505 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 20490 and 20505, than apply into the LCM equation.

GCF(20490,20505) = 15
LCM(20490,20505) = ( 20490 × 20505) / 15
LCM(20490,20505) = 420147450 / 15
LCM(20490,20505) = 28009830

Least Common Multiple (LCM) of 20490 and 20505 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 20490 and 20505. First we will calculate the prime factors of 20490 and 20505.

Prime Factorization of 20490

Prime Factorization of 20505

Now multiplying the highest exponent prime factors to calculate the LCM of 20490 and 20505.

LCM(20490,20505) = 2¹ × 3¹ × 5¹ × 683¹ × 1367¹
LCM(20490,20505) = 28009830