What is the Least Common Multiple of 685 and 692?
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 692 is 474020.
LCM(685,692) = 474020
Least Common Multiple of 685 and 692 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 692, than apply into the LCM equation.
GCF(685,692) = 1
LCM(685,692) = ( 685 × 692) / 1
LCM(685,692) = 474020 / 1
LCM(685,692) = 474020
Least Common Multiple (LCM) of 685 and 692 with Primes
Least common multiple can be found by multiplying the highest exponent prime factors of 685 and 692. First we will calculate the prime factors of 685 and 692.
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 692
Prime factors of 692 are 2, 173. Prime factorization of 692 in exponential form is:
692 = 22 × 1731
Now multiplying the highest exponent prime factors to calculate the LCM of 685 and 692.
LCM(685,692) = 51 × 1371 × 22 × 1731
LCM(685,692) = 474020
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