What is the Least Common Multiple of 21256 and 21268?

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 21256 and 21268 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21256 and 21268, than apply into the LCM equation.

GCF(21256,21268) = 4
LCM(21256,21268) = ( 21256 × 21268) / 4
LCM(21256,21268) = 452072608 / 4
LCM(21256,21268) = 113018152

Least Common Multiple (LCM) of 21256 and 21268 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21256 and 21268. First we will calculate the prime factors of 21256 and 21268.

Prime Factorization of 21256

Prime Factorization of 21268

Now multiplying the highest exponent prime factors to calculate the LCM of 21256 and 21268.

LCM(21256,21268) = 2³ × 2657¹ × 13¹ × 409¹
LCM(21256,21268) = 113018152