GCF (HCF) of 165 and 231
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What is the Greatest Common Divisor of 165 and 231?
Answer
GCF (HCF) of 165 and 231 is
33
Common factors: 1, 3, 11, 33
33 divides both: 165 ÷ 33 = 5, 231 ÷ 33 = 7 — and 5 and 7 share no factor but 1, so no larger number divides both.
165 = 3 × 5 × 11
231 = 3 × 7 × 11
| Prime | 165 | 231 | Lowest power |
|---|---|---|---|
| 3 | 3 | 3 | 3 |
| 5 | 5 | — | — |
| 7 | — | 7 | — |
| 11 | 11 | 11 | 11 |
— = power 0: the prime is not a factor of this number, so it cannot be in the GCF.
GCF = 3 × 11 = 33
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See Also
- Least Common Multiple - Find the Least Common Multiple (LCM) of two numbers
- Greatest Common Factor of 3 Numbers - Find the Greatest Common Factor (GCF) of three numbers
- Least Common Multiple of 3 Numbers - Find the Least Common Multiple (LCM) of three numbers
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GCF Table
| Number 1 | Number 2 | GCF |
|---|---|---|
| 165 | 216 | 3 |
| 165 | 217 | 1 |
| 165 | 218 | 1 |
| 165 | 219 | 3 |
| 165 | 220 | 55 |
| 165 | 221 | 1 |
| 165 | 222 | 3 |
| 165 | 223 | 1 |
| 165 | 224 | 1 |
| 165 | 225 | 15 |
| 165 | 226 | 1 |
| 165 | 227 | 1 |
| 165 | 228 | 3 |
| 165 | 229 | 1 |
| 165 | 230 | 5 |
| 165 | 231 | 33 |
| 165 | 232 | 1 |
| 165 | 233 | 1 |
| 165 | 234 | 3 |
| 165 | 235 | 5 |
| 165 | 236 | 1 |
| 165 | 237 | 3 |
| 165 | 238 | 1 |
| 165 | 239 | 1 |
| 165 | 240 | 15 |
| 165 | 241 | 1 |
| 165 | 242 | 11 |
| 165 | 243 | 3 |
| 165 | 244 | 1 |
| 165 | 245 | 5 |