Calculate the Least Common Multiple or LCM of 64, 81, 121 and 130
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The instructions to find the LCM of 64, 81, 121 and 130 are the next:
1. Decompose all numbers into prime factors
| 64 | 2 |
| 32 | 2 |
| 16 | 2 |
| 8 | 2 |
| 4 | 2 |
| 2 | 2 |
| 1 |
| 81 | 3 |
| 27 | 3 |
| 9 | 3 |
| 3 | 3 |
| 1 |
| 121 | 11 |
| 11 | 11 |
| 1 |
| 130 | 2 |
| 65 | 5 |
| 13 | 13 |
| 1 |
2. Write all numbers as the product of its prime factors
| Prime factors of 64 | = | 26 |
| Prime factors of 81 | = | 34 |
| Prime factors of 121 | = | 112 |
| Prime factors of 130 | = | 2 . 5 . 13 |
3. Choose the common and uncommon prime factors with the greatest exponent
Common prime factors: None
Common prime factors with the greatest exponent: None
Uncommon prime factors: 2 , 3 , 11 , 5 , 13
Uncommon prime factors with the greatest exponent: 26, 34, 112, 51, 131
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 = 26. 34. 112. 51. 131 = 40772160
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