What is the Least Common Multiple of 77280 and 77284?

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 77280 and 77284 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 77280 and 77284, than apply into the LCM equation.

GCF(77280,77284) = 4
LCM(77280,77284) = ( 77280 × 77284) / 4
LCM(77280,77284) = 5972507520 / 4
LCM(77280,77284) = 1493126880

Least Common Multiple (LCM) of 77280 and 77284 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 77280 and 77284. First we will calculate the prime factors of 77280 and 77284.

Prime Factorization of 77280

Prime Factorization of 77284

Now multiplying the highest exponent prime factors to calculate the LCM of 77280 and 77284.

LCM(77280,77284) = 2⁵ × 3¹ × 5¹ × 7¹ × 23¹ × 139²
LCM(77280,77284) = 1493126880