What is the Least Common Multiple of 670 and 675?
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 670 and 675 is 90450.
LCM(670,675) = 90450
Least Common Multiple of 670 and 675 with GCF Formula
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 670 and 675, than apply into the LCM equation.
GCF(670,675) = 5
LCM(670,675) = ( 670 × 675) / 5
LCM(670,675) = 452250 / 5
LCM(670,675) = 90450
Least Common Multiple (LCM) of 670 and 675 with Primes
Least common multiple can be found by multiplying the highest exponent prime factors of 670 and 675. First we will calculate the prime factors of 670 and 675.
Prime Factorization of 670
Prime factors of 670 are 2, 5, 67. Prime factorization of 670 in exponential form is:
670 = 21 × 51 × 671
Prime Factorization of 675
Prime factors of 675 are 3, 5. Prime factorization of 675 in exponential form is:
675 = 33 × 52
Now multiplying the highest exponent prime factors to calculate the LCM of 670 and 675.
LCM(670,675) = 21 × 52 × 671 × 33
LCM(670,675) = 90450
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