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What is the Least Common Multiple of 7998 and 8005?

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 7998 and 8005 is 64023990.

LCM(7998,8005) = 64023990

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Least Common Multiple of 7998 and 8005 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 7998 and 8005, than apply into the LCM equation.

GCF(7998,8005) = 1
LCM(7998,8005) = ( 7998 × 8005) / 1
LCM(7998,8005) = 64023990 / 1
LCM(7998,8005) = 64023990

Least Common Multiple (LCM) of 7998 and 8005 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 7998 and 8005. First we will calculate the prime factors of 7998 and 8005.

Prime Factorization of 7998

Prime factors of 7998 are 2, 3, 31, 43. Prime factorization of 7998 in exponential form is:

7998 = 21 × 31 × 311 × 431

Prime Factorization of 8005

Prime factors of 8005 are 5, 1601. Prime factorization of 8005 in exponential form is:

8005 = 51 × 16011

Now multiplying the highest exponent prime factors to calculate the LCM of 7998 and 8005.

LCM(7998,8005) = 21 × 31 × 311 × 431 × 51 × 16011
LCM(7998,8005) = 64023990