Calculate the Least Common Multiple or LCM of 138, 207 and 276
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The instructions to find the LCM of 138, 207 and 276 are the next:
1. Decompose all numbers into prime factors
| 138 | 2 |
| 69 | 3 |
| 23 | 23 |
| 1 |
| 207 | 3 |
| 69 | 3 |
| 23 | 23 |
| 1 |
| 276 | 2 |
| 138 | 2 |
| 69 | 3 |
| 23 | 23 |
| 1 |
2. Write all numbers as the product of its prime factors
| Prime factors of 138 | = | 2 . 3 . 23 |
| Prime factors of 207 | = | 32 . 23 |
| Prime factors of 276 | = | 22 . 3 . 23 |
3. Choose the common and uncommon prime factors with the greatest exponent
Common prime factors: 3 , 23
Common prime factors with the greatest exponent: 32, 231
Uncommon prime factors: 2
Uncommon prime factors with the greatest exponent: 22
4. Calculate the Least Common Multiple or LCM
Remember, to find the LCM of several numbers you must multiply the common and uncommon prime factors with the greatest exponent of those numbers.
LCM = 32. 231. 22 = 828
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