What is the Least Common Multiple of 71812 and 71820?

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 71812 and 71820 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 71812 and 71820, than apply into the LCM equation.

GCF(71812,71820) = 4
LCM(71812,71820) = ( 71812 × 71820) / 4
LCM(71812,71820) = 5157537840 / 4
LCM(71812,71820) = 1289384460

Least Common Multiple (LCM) of 71812 and 71820 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 71812 and 71820. First we will calculate the prime factors of 71812 and 71820.

Prime Factorization of 71812

Prime Factorization of 71820

Now multiplying the highest exponent prime factors to calculate the LCM of 71812 and 71820.

LCM(71812,71820) = 2² × 13¹ × 1381¹ × 3³ × 5¹ × 7¹ × 19¹
LCM(71812,71820) = 1289384460