What is the Least Common Multiple of 679 and 690?
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 679 and 690 is 468510.
LCM(679,690) = 468510
Least Common Multiple of 679 and 690 with GCF Formula
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 679 and 690, than apply into the LCM equation.
GCF(679,690) = 1
LCM(679,690) = ( 679 × 690) / 1
LCM(679,690) = 468510 / 1
LCM(679,690) = 468510
Least Common Multiple (LCM) of 679 and 690 with Primes
Least common multiple can be found by multiplying the highest exponent prime factors of 679 and 690. First we will calculate the prime factors of 679 and 690.
Prime Factorization of 679
Prime factors of 679 are 7, 97. Prime factorization of 679 in exponential form is:
679 = 71 × 971
Prime Factorization of 690
Prime factors of 690 are 2, 3, 5, 23. Prime factorization of 690 in exponential form is:
690 = 21 × 31 × 51 × 231
Now multiplying the highest exponent prime factors to calculate the LCM of 679 and 690.
LCM(679,690) = 71 × 971 × 21 × 31 × 51 × 231
LCM(679,690) = 468510
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