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What is the Least Common Multiple of 69408 and 69420?

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 69408 and 69420 is 401525280.

LCM(69408,69420) = 401525280

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Least Common Multiple of 69408 and 69420 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 69408 and 69420, than apply into the LCM equation.

GCF(69408,69420) = 12
LCM(69408,69420) = ( 69408 × 69420) / 12
LCM(69408,69420) = 4818303360 / 12
LCM(69408,69420) = 401525280

Least Common Multiple (LCM) of 69408 and 69420 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 69408 and 69420. First we will calculate the prime factors of 69408 and 69420.

Prime Factorization of 69408

Prime factors of 69408 are 2, 3, 241. Prime factorization of 69408 in exponential form is:

69408 = 25 × 32 × 2411

Prime Factorization of 69420

Prime factors of 69420 are 2, 3, 5, 13, 89. Prime factorization of 69420 in exponential form is:

69420 = 22 × 31 × 51 × 131 × 891

Now multiplying the highest exponent prime factors to calculate the LCM of 69408 and 69420.

LCM(69408,69420) = 25 × 32 × 2411 × 51 × 131 × 891
LCM(69408,69420) = 401525280