Calculate the Least Common Multiple or LCM of 154, 231 and 385
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The instructions to find the LCM of 154, 231 and 385 are the next:
1. Decompose all numbers into prime factors
| 154 | 2 |
| 77 | 7 |
| 11 | 11 |
| 1 |
| 231 | 3 |
| 77 | 7 |
| 11 | 11 |
| 1 |
| 385 | 5 |
| 77 | 7 |
| 11 | 11 |
| 1 |
2. Write all numbers as the product of its prime factors
| Prime factors of 154 | = | 2 . 7 . 11 |
| Prime factors of 231 | = | 3 . 7 . 11 |
| Prime factors of 385 | = | 5 . 7 . 11 |
3. Choose the common and uncommon prime factors with the greatest exponent
Common prime factors: 7 , 11
Common prime factors with the greatest exponent: 71, 111
Uncommon prime factors: 2 , 3 , 5
Uncommon prime factors with the greatest exponent: 21, 31, 51
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 = 71. 111. 21. 31. 51 = 2310
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