What is the Least Common Multiple of 20820 and 20828?

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 20820 and 20828 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 20820 and 20828, than apply into the LCM equation.

GCF(20820,20828) = 4
LCM(20820,20828) = ( 20820 × 20828) / 4
LCM(20820,20828) = 433638960 / 4
LCM(20820,20828) = 108409740

Least Common Multiple (LCM) of 20820 and 20828 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 20820 and 20828. First we will calculate the prime factors of 20820 and 20828.

Prime Factorization of 20820

Prime Factorization of 20828

Now multiplying the highest exponent prime factors to calculate the LCM of 20820 and 20828.

LCM(20820,20828) = 2² × 3¹ × 5¹ × 347¹ × 41¹ × 127¹
LCM(20820,20828) = 108409740