What is the Least Common Multiple of 21815 and 21831?

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 21815 and 21831 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21815 and 21831, than apply into the LCM equation.

GCF(21815,21831) = 1
LCM(21815,21831) = ( 21815 × 21831) / 1
LCM(21815,21831) = 476243265 / 1
LCM(21815,21831) = 476243265

Least Common Multiple (LCM) of 21815 and 21831 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21815 and 21831. First we will calculate the prime factors of 21815 and 21831.

Prime Factorization of 21815

Prime Factorization of 21831

Now multiplying the highest exponent prime factors to calculate the LCM of 21815 and 21831.

LCM(21815,21831) = 5¹ × 4363¹ × 3¹ × 19¹ × 383¹
LCM(21815,21831) = 476243265