GCF and LCM Calculator Logo

What is the Least Common Multiple of 638 and 653?

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 638 and 653 is 416614.

LCM(638,653) = 416614

LCM Calculator and
and

Least Common Multiple of 638 and 653 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 638 and 653, than apply into the LCM equation.

GCF(638,653) = 1
LCM(638,653) = ( 638 × 653) / 1
LCM(638,653) = 416614 / 1
LCM(638,653) = 416614

Least Common Multiple (LCM) of 638 and 653 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 638 and 653. First we will calculate the prime factors of 638 and 653.

Prime Factorization of 638

Prime factors of 638 are 2, 11, 29. Prime factorization of 638 in exponential form is:

638 = 21 × 111 × 291

Prime Factorization of 653

Prime factors of 653 are 653. Prime factorization of 653 in exponential form is:

653 = 6531

Now multiplying the highest exponent prime factors to calculate the LCM of 638 and 653.

LCM(638,653) = 21 × 111 × 291 × 6531
LCM(638,653) = 416614