What is the Least Common Multiple of 28560 and 28565?

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 28560 and 28565 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 28560 and 28565, than apply into the LCM equation.

GCF(28560,28565) = 5
LCM(28560,28565) = ( 28560 × 28565) / 5
LCM(28560,28565) = 815816400 / 5
LCM(28560,28565) = 163163280

Least Common Multiple (LCM) of 28560 and 28565 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 28560 and 28565. First we will calculate the prime factors of 28560 and 28565.

Prime Factorization of 28560

Prime Factorization of 28565

Now multiplying the highest exponent prime factors to calculate the LCM of 28560 and 28565.

LCM(28560,28565) = 2⁴ × 3¹ × 5¹ × 7¹ × 17¹ × 29¹ × 197¹
LCM(28560,28565) = 163163280