What is the Least Common Multiple of 8440 and 8455?

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 8440 and 8455 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 8440 and 8455, than apply into the LCM equation.

GCF(8440,8455) = 5
LCM(8440,8455) = ( 8440 × 8455) / 5
LCM(8440,8455) = 71360200 / 5
LCM(8440,8455) = 14272040

Least Common Multiple (LCM) of 8440 and 8455 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 8440 and 8455. First we will calculate the prime factors of 8440 and 8455.

Prime Factorization of 8440

Prime Factorization of 8455

Now multiplying the highest exponent prime factors to calculate the LCM of 8440 and 8455.

LCM(8440,8455) = 2³ × 5¹ × 211¹ × 19¹ × 89¹
LCM(8440,8455) = 14272040