What is the Least Common Multiple of 82415 and 82420?

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 82415 and 82420 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 82415 and 82420, than apply into the LCM equation.

GCF(82415,82420) = 5
LCM(82415,82420) = ( 82415 × 82420) / 5
LCM(82415,82420) = 6792644300 / 5
LCM(82415,82420) = 1358528860

Least Common Multiple (LCM) of 82415 and 82420 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 82415 and 82420. First we will calculate the prime factors of 82415 and 82420.

Prime Factorization of 82415

Prime Factorization of 82420

Now multiplying the highest exponent prime factors to calculate the LCM of 82415 and 82420.

LCM(82415,82420) = 5¹ × 53¹ × 311¹ × 2² × 13¹ × 317¹
LCM(82415,82420) = 1358528860