What is the Least Common Multiple of 4000 and 4005?
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 4000 and 4005 is 3204000.
LCM(4000,4005) = 3204000
Least Common Multiple of 4000 and 4005 with GCF Formula
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 4000 and 4005, than apply into the LCM equation.
GCF(4000,4005) = 5
LCM(4000,4005) = ( 4000 × 4005) / 5
LCM(4000,4005) = 16020000 / 5
LCM(4000,4005) = 3204000
Least Common Multiple (LCM) of 4000 and 4005 with Primes
Least common multiple can be found by multiplying the highest exponent prime factors of 4000 and 4005. First we will calculate the prime factors of 4000 and 4005.
Prime Factorization of 4000
Prime factors of 4000 are 2, 5. Prime factorization of 4000 in exponential form is:
4000 = 25 × 53
Prime Factorization of 4005
Prime factors of 4005 are 3, 5, 89. Prime factorization of 4005 in exponential form is:
4005 = 32 × 51 × 891
Now multiplying the highest exponent prime factors to calculate the LCM of 4000 and 4005.
LCM(4000,4005) = 25 × 53 × 32 × 891
LCM(4000,4005) = 3204000
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