Least Common Multiple (LCM) of 21 and 147
The least common multiple (LCM) of 21 and 147 is 147.
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 147?
First, calculate the GCD of 21 and 147 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 21 ÷ 147 = 0 remainder 21 |
| 2 | 147 ÷ 21 = 7 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 49 and 40 | 1960 |
| 122 and 15 | 1830 |
| 179 and 131 | 23449 |
| 127 and 148 | 18796 |
| 102 and 176 | 8976 |