What is the Least Common Multiple of 20970 and 20978?

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 20970 and 20978 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 20970 and 20978, than apply into the LCM equation.

GCF(20970,20978) = 2
LCM(20970,20978) = ( 20970 × 20978) / 2
LCM(20970,20978) = 439908660 / 2
LCM(20970,20978) = 219954330

Least Common Multiple (LCM) of 20970 and 20978 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 20970 and 20978. First we will calculate the prime factors of 20970 and 20978.

Prime Factorization of 20970

Prime Factorization of 20978

Now multiplying the highest exponent prime factors to calculate the LCM of 20970 and 20978.

LCM(20970,20978) = 2¹ × 3² × 5¹ × 233¹ × 17¹ × 617¹
LCM(20970,20978) = 219954330