Least Common Multiple (LCM) of 21 and 164
The least common multiple (LCM) of 21 and 164 is 3444.
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 164?
First, calculate the GCD of 21 and 164 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 21 ÷ 164 = 0 remainder 21 |
| 2 | 164 ÷ 21 = 7 remainder 17 |
| 3 | 21 ÷ 17 = 1 remainder 4 |
| 4 | 17 ÷ 4 = 4 remainder 1 |
| 5 | 4 ÷ 1 = 4 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 151 and 143 | 21593 |
| 80 and 33 | 2640 |
| 20 and 167 | 3340 |
| 195 and 180 | 2340 |
| 182 and 87 | 15834 |