What is the Least Common Multiple of 39988 and 40008?

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 39988 and 40008 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 39988 and 40008, than apply into the LCM equation.

GCF(39988,40008) = 4
LCM(39988,40008) = ( 39988 × 40008) / 4
LCM(39988,40008) = 1599839904 / 4
LCM(39988,40008) = 399959976

Least Common Multiple (LCM) of 39988 and 40008 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 39988 and 40008. First we will calculate the prime factors of 39988 and 40008.

Prime Factorization of 39988

Prime Factorization of 40008

Now multiplying the highest exponent prime factors to calculate the LCM of 39988 and 40008.

LCM(39988,40008) = 2³ × 13¹ × 769¹ × 3¹ × 1667¹
LCM(39988,40008) = 399959976