Least Common Multiple (LCM) of 21 and 127
The least common multiple (LCM) of 21 and 127 is 2667.
What is the Least Common Multiple (LCM)?
The LCM of two integers is the smallest positive integer that is divisible by both numbers. It is often used to find common denominators and solve problems involving periodic events.
Formula for LCM
The LCM of two numbers can be calculated using their GCD:
LCM(a, b) = |a × b| ÷ GCD(a, b)
How to Calculate the LCM of 21 and 127?
First, calculate the GCD of 21 and 127 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 21 ÷ 127 = 0 remainder 21 |
| 2 | 127 ÷ 21 = 6 remainder 1 |
| 3 | 21 ÷ 1 = 21 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 155 and 65 | 2015 |
| 174 and 155 | 26970 |
| 23 and 149 | 3427 |
| 146 and 56 | 4088 |
| 155 and 131 | 20305 |