GCF and LCM Calculator Logo

What is the Least Common Multiple of 68408 and 68421?

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 68408 and 68421 is 4680543768.

LCM(68408,68421) = 4680543768

LCM Calculator and
and

Least Common Multiple of 68408 and 68421 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 68408 and 68421, than apply into the LCM equation.

GCF(68408,68421) = 1
LCM(68408,68421) = ( 68408 × 68421) / 1
LCM(68408,68421) = 4680543768 / 1
LCM(68408,68421) = 4680543768

Least Common Multiple (LCM) of 68408 and 68421 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 68408 and 68421. First we will calculate the prime factors of 68408 and 68421.

Prime Factorization of 68408

Prime factors of 68408 are 2, 17, 503. Prime factorization of 68408 in exponential form is:

68408 = 23 × 171 × 5031

Prime Factorization of 68421

Prime factors of 68421 are 3, 22807. Prime factorization of 68421 in exponential form is:

68421 = 31 × 228071

Now multiplying the highest exponent prime factors to calculate the LCM of 68408 and 68421.

LCM(68408,68421) = 23 × 171 × 5031 × 31 × 228071
LCM(68408,68421) = 4680543768