What is the Least Common Multiple of 624 and 639?
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 624 and 639 is 132912.
LCM(624,639) = 132912
Least Common Multiple of 624 and 639 with GCF Formula
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 624 and 639, than apply into the LCM equation.
GCF(624,639) = 3
LCM(624,639) = ( 624 × 639) / 3
LCM(624,639) = 398736 / 3
LCM(624,639) = 132912
Least Common Multiple (LCM) of 624 and 639 with Primes
Least common multiple can be found by multiplying the highest exponent prime factors of 624 and 639. First we will calculate the prime factors of 624 and 639.
Prime Factorization of 624
Prime factors of 624 are 2, 3, 13. Prime factorization of 624 in exponential form is:
624 = 24 × 31 × 131
Prime Factorization of 639
Prime factors of 639 are 3, 71. Prime factorization of 639 in exponential form is:
639 = 32 × 711
Now multiplying the highest exponent prime factors to calculate the LCM of 624 and 639.
LCM(624,639) = 24 × 32 × 131 × 711
LCM(624,639) = 132912
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