What is the Least Common Multiple of 13680 and 13688?
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 13680 and 13688 is 23406480.
LCM(13680,13688) = 23406480
Least Common Multiple of 13680 and 13688 with GCF Formula
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 13680 and 13688, than apply into the LCM equation.
GCF(13680,13688) = 8
LCM(13680,13688) = ( 13680 × 13688) / 8
LCM(13680,13688) = 187251840 / 8
LCM(13680,13688) = 23406480
Least Common Multiple (LCM) of 13680 and 13688 with Primes
Least common multiple can be found by multiplying the highest exponent prime factors of 13680 and 13688. First we will calculate the prime factors of 13680 and 13688.
Prime Factorization of 13680
Prime factors of 13680 are 2, 3, 5, 19. Prime factorization of 13680 in exponential form is:
13680 = 24 × 32 × 51 × 191
Prime Factorization of 13688
Prime factors of 13688 are 2, 29, 59. Prime factorization of 13688 in exponential form is:
13688 = 23 × 291 × 591
Now multiplying the highest exponent prime factors to calculate the LCM of 13680 and 13688.
LCM(13680,13688) = 24 × 32 × 51 × 191 × 291 × 591
LCM(13680,13688) = 23406480
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