What is the Least Common Multiple of 15615 and 15620?

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 15615 and 15620 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 15615 and 15620, than apply into the LCM equation.

GCF(15615,15620) = 5
LCM(15615,15620) = ( 15615 × 15620) / 5
LCM(15615,15620) = 243906300 / 5
LCM(15615,15620) = 48781260

Least Common Multiple (LCM) of 15615 and 15620 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 15615 and 15620. First we will calculate the prime factors of 15615 and 15620.

Prime Factorization of 15615

Prime Factorization of 15620

Now multiplying the highest exponent prime factors to calculate the LCM of 15615 and 15620.

LCM(15615,15620) = 3² × 5¹ × 347¹ × 2² × 11¹ × 71¹
LCM(15615,15620) = 48781260