What is the Least Common Multiple of 685 and 699?
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 685 and 699 is 478815.
LCM(685,699) = 478815
Least Common Multiple of 685 and 699 with GCF Formula
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 685 and 699, than apply into the LCM equation.
GCF(685,699) = 1
LCM(685,699) = ( 685 × 699) / 1
LCM(685,699) = 478815 / 1
LCM(685,699) = 478815
Least Common Multiple (LCM) of 685 and 699 with Primes
Least common multiple can be found by multiplying the highest exponent prime factors of 685 and 699. First we will calculate the prime factors of 685 and 699.
Prime Factorization of 685
Prime factors of 685 are 5, 137. Prime factorization of 685 in exponential form is:
685 = 51 × 1371
Prime Factorization of 699
Prime factors of 699 are 3, 233. Prime factorization of 699 in exponential form is:
699 = 31 × 2331
Now multiplying the highest exponent prime factors to calculate the LCM of 685 and 699.
LCM(685,699) = 51 × 1371 × 31 × 2331
LCM(685,699) = 478815
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