What is the Least Common Multiple of 21808 and 21816?

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 21808 and 21816 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21808 and 21816, than apply into the LCM equation.

GCF(21808,21816) = 8
LCM(21808,21816) = ( 21808 × 21816) / 8
LCM(21808,21816) = 475763328 / 8
LCM(21808,21816) = 59470416

Least Common Multiple (LCM) of 21808 and 21816 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21808 and 21816. First we will calculate the prime factors of 21808 and 21816.

Prime Factorization of 21808

Prime Factorization of 21816

Now multiplying the highest exponent prime factors to calculate the LCM of 21808 and 21816.

LCM(21808,21816) = 2⁴ × 29¹ × 47¹ × 3³ × 101¹
LCM(21808,21816) = 59470416