What is the Least Common Multiple of 720 and 730?
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 (LCM) of 720 and 730 is 52560.
LCM(720,730) = 52560
Least Common Multiple of 720 and 730 with GCF Formula
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 720 and 730, than apply into the LCM equation.
GCF(720,730) = 10
LCM(720,730) = ( 720 × 730) / 10
LCM(720,730) = 525600 / 10
LCM(720,730) = 52560
Least Common Multiple (LCM) of 720 and 730 with Primes
Least common multiple can be found by multiplying the highest exponent prime factors of 720 and 730. First we will calculate the prime factors of 720 and 730.
Prime Factorization of 720
Prime factors of 720 are 2, 3, 5. Prime factorization of 720 in exponential form is:
720 = 24 × 32 × 51
Prime Factorization of 730
Prime factors of 730 are 2, 5, 73. Prime factorization of 730 in exponential form is:
730 = 21 × 51 × 731
Now multiplying the highest exponent prime factors to calculate the LCM of 720 and 730.
LCM(720,730) = 24 × 32 × 51 × 731
LCM(720,730) = 52560
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