What is the Least Common Multiple of 42805 and 42815?

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 42805 and 42815 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 42805 and 42815, than apply into the LCM equation.

GCF(42805,42815) = 5
LCM(42805,42815) = ( 42805 × 42815) / 5
LCM(42805,42815) = 1832696075 / 5
LCM(42805,42815) = 366539215

Least Common Multiple (LCM) of 42805 and 42815 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 42805 and 42815. First we will calculate the prime factors of 42805 and 42815.

Prime Factorization of 42805

Prime Factorization of 42815

Now multiplying the highest exponent prime factors to calculate the LCM of 42805 and 42815.

LCM(42805,42815) = 5¹ × 7¹ × 1223¹ × 8563¹
LCM(42805,42815) = 366539215