What is the Least Common Multiple of 275 and 280?

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 275 and 280 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 275 and 280, than apply into the LCM equation.

GCF(275,280) = 5
LCM(275,280) = ( 275 × 280) / 5
LCM(275,280) = 77000 / 5
LCM(275,280) = 15400

Least Common Multiple (LCM) of 275 and 280 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 275 and 280. First we will calculate the prime factors of 275 and 280.

Prime Factorization of 275

Prime Factorization of 280

Now multiplying the highest exponent prime factors to calculate the LCM of 275 and 280.

LCM(275,280) = 5² × 11¹ × 2³ × 7¹
LCM(275,280) = 15400