What is the Least Common Multiple of 412 and 420?
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 412 and 420 is 43260.
LCM(412,420) = 43260
Least Common Multiple of 412 and 420 with GCF Formula
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 412 and 420, than apply into the LCM equation.
GCF(412,420) = 4
LCM(412,420) = ( 412 × 420) / 4
LCM(412,420) = 173040 / 4
LCM(412,420) = 43260
Least Common Multiple (LCM) of 412 and 420 with Primes
Least common multiple can be found by multiplying the highest exponent prime factors of 412 and 420. First we will calculate the prime factors of 412 and 420.
Prime Factorization of 412
Prime factors of 412 are 2, 103. Prime factorization of 412 in exponential form is:
412 = 22 × 1031
Prime Factorization of 420
Prime factors of 420 are 2, 3, 5, 7. Prime factorization of 420 in exponential form is:
420 = 22 × 31 × 51 × 71
Now multiplying the highest exponent prime factors to calculate the LCM of 412 and 420.
LCM(412,420) = 22 × 1031 × 31 × 51 × 71
LCM(412,420) = 43260
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