What is the Least Common Multiple of 690 and 709?
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 690 and 709 is 489210.
LCM(690,709) = 489210
Least Common Multiple of 690 and 709 with GCF Formula
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 690 and 709, than apply into the LCM equation.
GCF(690,709) = 1
LCM(690,709) = ( 690 × 709) / 1
LCM(690,709) = 489210 / 1
LCM(690,709) = 489210
Least Common Multiple (LCM) of 690 and 709 with Primes
Least common multiple can be found by multiplying the highest exponent prime factors of 690 and 709. First we will calculate the prime factors of 690 and 709.
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
Prime Factorization of 709
Prime factors of 709 are 709. Prime factorization of 709 in exponential form is:
709 = 7091
Now multiplying the highest exponent prime factors to calculate the LCM of 690 and 709.
LCM(690,709) = 21 × 31 × 51 × 231 × 7091
LCM(690,709) = 489210
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