What is the Least Common Multiple of 21608 and 21628?

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 of 21608 and 21628 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21608 and 21628, than apply into the LCM equation.

GCF(21608,21628) = 4
LCM(21608,21628) = ( 21608 × 21628) / 4
LCM(21608,21628) = 467337824 / 4
LCM(21608,21628) = 116834456

Least Common Multiple (LCM) of 21608 and 21628 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21608 and 21628. First we will calculate the prime factors of 21608 and 21628.

Prime Factorization of 21608

Prime Factorization of 21628

Now multiplying the highest exponent prime factors to calculate the LCM of 21608 and 21628.

LCM(21608,21628) = 2³ × 37¹ × 73¹ × 5407¹
LCM(21608,21628) = 116834456