Least Common Multiple (LCM) of 121 and 172
The least common multiple (LCM) of 121 and 172 is 20812.
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 121 and 172?
First, calculate the GCD of 121 and 172 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 121 ÷ 172 = 0 remainder 121 |
| 2 | 172 ÷ 121 = 1 remainder 51 |
| 3 | 121 ÷ 51 = 2 remainder 19 |
| 4 | 51 ÷ 19 = 2 remainder 13 |
| 5 | 19 ÷ 13 = 1 remainder 6 |
| 6 | 13 ÷ 6 = 2 remainder 1 |
| 7 | 6 ÷ 1 = 6 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 145 and 56 | 8120 |
| 184 and 133 | 24472 |
| 13 and 91 | 91 |
| 135 and 150 | 1350 |
| 158 and 160 | 12640 |