What is the Least Common Multiple of 20790 and 20805?

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 20790 and 20805 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 20790 and 20805, than apply into the LCM equation.

GCF(20790,20805) = 15
LCM(20790,20805) = ( 20790 × 20805) / 15
LCM(20790,20805) = 432535950 / 15
LCM(20790,20805) = 28835730

Least Common Multiple (LCM) of 20790 and 20805 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 20790 and 20805. First we will calculate the prime factors of 20790 and 20805.

Prime Factorization of 20790

Prime Factorization of 20805

Now multiplying the highest exponent prime factors to calculate the LCM of 20790 and 20805.

LCM(20790,20805) = 2¹ × 3³ × 5¹ × 7¹ × 11¹ × 19¹ × 73¹
LCM(20790,20805) = 28835730