Calculate the Greatest Common Factor or GCF of 484 and 2420
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The instructions to find the GCF of 484 and 2420 are the next:
1. Decompose all numbers into prime factors
484 | 2 |
242 | 2 |
121 | 11 |
11 | 11 |
1 |
2420 | 2 |
1210 | 2 |
605 | 5 |
121 | 11 |
11 | 11 |
1 |
2. Write all numbers as the product of its prime factors
Prime factors of 484 | = | 22 . 112 |
Prime factors of 2420 | = | 22 . 5 . 112 |
3. Choose the common prime factors with the lowest exponent
Common prime factors: 2 , 11
Common prime factors with the lowest exponent: 22, 112
4. Calculate the Greatest Common Factor or GCF
Remember, to find the GCF of several numbers you must multiply the common prime factors with the lowest exponent.
GCF = 22. 112 = 484
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