What is the Least Common Multiple of 85820 and 85840?

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 85820 and 85840 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 85820 and 85840, than apply into the LCM equation.

GCF(85820,85840) = 20
LCM(85820,85840) = ( 85820 × 85840) / 20
LCM(85820,85840) = 7366788800 / 20
LCM(85820,85840) = 368339440

Least Common Multiple (LCM) of 85820 and 85840 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 85820 and 85840. First we will calculate the prime factors of 85820 and 85840.

Prime Factorization of 85820

Prime Factorization of 85840

Now multiplying the highest exponent prime factors to calculate the LCM of 85820 and 85840.

LCM(85820,85840) = 2⁴ × 5¹ × 7¹ × 613¹ × 29¹ × 37¹
LCM(85820,85840) = 368339440