The prime factorization of 561 is:
$$ 561 = 3\cdot11\cdot17 $$Prime factorization can be nicely visualized by creating a factorization tree.
| 561 can be written as 3 × 187. |
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| 187 can be written as 11 × 17. |
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| The end nodes are the prime factors of the number 561. |
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