What is the Least Common Multiple of 72170 and 72178?

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 72170 and 72178 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 72170 and 72178, than apply into the LCM equation.

GCF(72170,72178) = 2
LCM(72170,72178) = ( 72170 × 72178) / 2
LCM(72170,72178) = 5209086260 / 2
LCM(72170,72178) = 2604543130

Least Common Multiple (LCM) of 72170 and 72178 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 72170 and 72178. First we will calculate the prime factors of 72170 and 72178.

Prime Factorization of 72170

Prime Factorization of 72178

Now multiplying the highest exponent prime factors to calculate the LCM of 72170 and 72178.

LCM(72170,72178) = 2¹ × 5¹ × 7¹ × 1031¹ × 151¹ × 239¹
LCM(72170,72178) = 2604543130