Calculate the Greatest Common Factor or GCF of 243
Sponsors
The instructions to find the GCF of 243 are the next:
1. Decompose all numbers into prime factors
| 243 | 3 |
| 81 | 3 |
| 27 | 3 |
| 9 | 3 |
| 3 | 3 |
| 1 |
2. Write all numbers as the product of its prime factors
| Prime factors of 243 | = | 35 |
3. Choose the common prime factors with the lowest exponent
Common prime factors: 3
Common prime factors with the lowest exponent: 35
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 = 35 = 243
Also calculates the: