What is the Least Common Multiple of 68420 and 68431?

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 68420 and 68431 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 68420 and 68431, than apply into the LCM equation.

GCF(68420,68431) = 11
LCM(68420,68431) = ( 68420 × 68431) / 11
LCM(68420,68431) = 4682049020 / 11
LCM(68420,68431) = 425640820

Least Common Multiple (LCM) of 68420 and 68431 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 68420 and 68431. First we will calculate the prime factors of 68420 and 68431.

Prime Factorization of 68420

Prime Factorization of 68431

Now multiplying the highest exponent prime factors to calculate the LCM of 68420 and 68431.

LCM(68420,68431) = 2² × 5¹ × 11¹ × 311¹ × 6221¹
LCM(68420,68431) = 425640820