What is the Least Common Multiple of 663 and 680?
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 663 and 680 is 26520.
LCM(663,680) = 26520
Least Common Multiple of 663 and 680 with GCF Formula
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 663 and 680, than apply into the LCM equation.
GCF(663,680) = 17
LCM(663,680) = ( 663 × 680) / 17
LCM(663,680) = 450840 / 17
LCM(663,680) = 26520
Least Common Multiple (LCM) of 663 and 680 with Primes
Least common multiple can be found by multiplying the highest exponent prime factors of 663 and 680. First we will calculate the prime factors of 663 and 680.
Prime Factorization of 663
Prime factors of 663 are 3, 13, 17. Prime factorization of 663 in exponential form is:
663 = 31 × 131 × 171
Prime Factorization of 680
Prime factors of 680 are 2, 5, 17. Prime factorization of 680 in exponential form is:
680 = 23 × 51 × 171
Now multiplying the highest exponent prime factors to calculate the LCM of 663 and 680.
LCM(663,680) = 31 × 131 × 171 × 23 × 51
LCM(663,680) = 26520
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