What is the Least Common Multiple of 87680 and 87685?

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 87680 and 87685 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 87680 and 87685, than apply into the LCM equation.

GCF(87680,87685) = 5
LCM(87680,87685) = ( 87680 × 87685) / 5
LCM(87680,87685) = 7688220800 / 5
LCM(87680,87685) = 1537644160

Least Common Multiple (LCM) of 87680 and 87685 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 87680 and 87685. First we will calculate the prime factors of 87680 and 87685.

Prime Factorization of 87680

Prime Factorization of 87685

Now multiplying the highest exponent prime factors to calculate the LCM of 87680 and 87685.

LCM(87680,87685) = 2⁷ × 5¹ × 137¹ × 13¹ × 19¹ × 71¹
LCM(87680,87685) = 1537644160