What is the Least Common Multiple of 78878 and 78890?

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 78878 and 78890 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 78878 and 78890, than apply into the LCM equation.

GCF(78878,78890) = 2
LCM(78878,78890) = ( 78878 × 78890) / 2
LCM(78878,78890) = 6222685420 / 2
LCM(78878,78890) = 3111342710

Least Common Multiple (LCM) of 78878 and 78890 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 78878 and 78890. First we will calculate the prime factors of 78878 and 78890.

Prime Factorization of 78878

Prime Factorization of 78890

Now multiplying the highest exponent prime factors to calculate the LCM of 78878 and 78890.

LCM(78878,78890) = 2¹ × 39439¹ × 5¹ × 7³ × 23¹
LCM(78878,78890) = 3111342710