What is the Least Common Multiple of 61920 and 61930?
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 61920 and 61930 is 383470560.
LCM(61920,61930) = 383470560
Least Common Multiple of 61920 and 61930 with GCF Formula
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 61920 and 61930, than apply into the LCM equation.
GCF(61920,61930) = 10
LCM(61920,61930) = ( 61920 × 61930) / 10
LCM(61920,61930) = 3834705600 / 10
LCM(61920,61930) = 383470560
Least Common Multiple (LCM) of 61920 and 61930 with Primes
Least common multiple can be found by multiplying the highest exponent prime factors of 61920 and 61930. First we will calculate the prime factors of 61920 and 61930.
Prime Factorization of 61920
Prime factors of 61920 are 2, 3, 5, 43. Prime factorization of 61920 in exponential form is:
61920 = 25 × 32 × 51 × 431
Prime Factorization of 61930
Prime factors of 61930 are 2, 5, 11, 563. Prime factorization of 61930 in exponential form is:
61930 = 21 × 51 × 111 × 5631
Now multiplying the highest exponent prime factors to calculate the LCM of 61920 and 61930.
LCM(61920,61930) = 25 × 32 × 51 × 431 × 111 × 5631
LCM(61920,61930) = 383470560
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