Calculate the Greatest Common Factor or GCF of 987
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The instructions to find the GCF of 987 are the next:
1. Decompose all numbers into prime factors
| 987 | 3 |
| 329 | 7 |
| 47 | 47 |
| 1 |
2. Write all numbers as the product of its prime factors
| Prime factors of 987 | = | 3 . 7 . 47 |
3. Choose the common prime factors with the lowest exponent
Common prime factors: 3 , 7 , 47
Common prime factors with the lowest exponent: 31, 71, 471
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 = 31. 71. 471 = 987
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