What is the Least Common Multiple of 640 and 656?
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 640 and 656 is 26240.
LCM(640,656) = 26240
Least Common Multiple of 640 and 656 with GCF Formula
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 640 and 656, than apply into the LCM equation.
GCF(640,656) = 16
LCM(640,656) = ( 640 × 656) / 16
LCM(640,656) = 419840 / 16
LCM(640,656) = 26240
Least Common Multiple (LCM) of 640 and 656 with Primes
Least common multiple can be found by multiplying the highest exponent prime factors of 640 and 656. First we will calculate the prime factors of 640 and 656.
Prime Factorization of 640
Prime factors of 640 are 2, 5. Prime factorization of 640 in exponential form is:
640 = 27 × 51
Prime Factorization of 656
Prime factors of 656 are 2, 41. Prime factorization of 656 in exponential form is:
656 = 24 × 411
Now multiplying the highest exponent prime factors to calculate the LCM of 640 and 656.
LCM(640,656) = 27 × 51 × 411
LCM(640,656) = 26240
Related Least Common Multiples of 640
- LCM of 640 and 644
- LCM of 640 and 645
- LCM of 640 and 646
- LCM of 640 and 647
- LCM of 640 and 648
- LCM of 640 and 649
- LCM of 640 and 650
- LCM of 640 and 651
- LCM of 640 and 652
- LCM of 640 and 653
- LCM of 640 and 654
- LCM of 640 and 655
- LCM of 640 and 656
- LCM of 640 and 657
- LCM of 640 and 658
- LCM of 640 and 659
- LCM of 640 and 660
Related Least Common Multiples of 656
- LCM of 656 and 660
- LCM of 656 and 661
- LCM of 656 and 662
- LCM of 656 and 663
- LCM of 656 and 664
- LCM of 656 and 665
- LCM of 656 and 666
- LCM of 656 and 667
- LCM of 656 and 668
- LCM of 656 and 669
- LCM of 656 and 670
- LCM of 656 and 671
- LCM of 656 and 672
- LCM of 656 and 673
- LCM of 656 and 674
- LCM of 656 and 675
- LCM of 656 and 676