What is the Least Common Multiple of 7870 and 7878?

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 7870 and 7878 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 7870 and 7878, than apply into the LCM equation.

GCF(7870,7878) = 2
LCM(7870,7878) = ( 7870 × 7878) / 2
LCM(7870,7878) = 61999860 / 2
LCM(7870,7878) = 30999930

Least Common Multiple (LCM) of 7870 and 7878 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 7870 and 7878. First we will calculate the prime factors of 7870 and 7878.

Prime Factorization of 7870

Prime Factorization of 7878

Now multiplying the highest exponent prime factors to calculate the LCM of 7870 and 7878.

LCM(7870,7878) = 2¹ × 5¹ × 787¹ × 3¹ × 13¹ × 101¹
LCM(7870,7878) = 30999930