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What is the Least Common Multiple of 3998 and 4003?

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 (LCM) of 3998 and 4003 is 16003994.

LCM(3998,4003) = 16003994

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Least Common Multiple of 3998 and 4003 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 3998 and 4003, than apply into the LCM equation.

GCF(3998,4003) = 1
LCM(3998,4003) = ( 3998 × 4003) / 1
LCM(3998,4003) = 16003994 / 1
LCM(3998,4003) = 16003994

Least Common Multiple (LCM) of 3998 and 4003 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 3998 and 4003. First we will calculate the prime factors of 3998 and 4003.

Prime Factorization of 3998

Prime factors of 3998 are 2, 1999. Prime factorization of 3998 in exponential form is:

3998 = 21 × 19991

Prime Factorization of 4003

Prime factors of 4003 are 4003. Prime factorization of 4003 in exponential form is:

4003 = 40031

Now multiplying the highest exponent prime factors to calculate the LCM of 3998 and 4003.

LCM(3998,4003) = 21 × 19991 × 40031
LCM(3998,4003) = 16003994