What is the Least Common Multiple of 515 and 520?

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 515 and 520 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 515 and 520, than apply into the LCM equation.

GCF(515,520) = 5
LCM(515,520) = ( 515 × 520) / 5
LCM(515,520) = 267800 / 5
LCM(515,520) = 53560

Least Common Multiple (LCM) of 515 and 520 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 515 and 520. First we will calculate the prime factors of 515 and 520.

Prime Factorization of 515

Prime Factorization of 520

Now multiplying the highest exponent prime factors to calculate the LCM of 515 and 520.

LCM(515,520) = 5¹ × 103¹ × 2³ × 13¹
LCM(515,520) = 53560