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Factors of 231

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What are the Factors of 231?

Answer

Factors of 231:

1, 3, 7, 11, 21, 33, 77, 231

8 factors · 231 = 3 × 7 × 11 · composite

Underlined — prime: 3, 7, 11 · 1 — neither prime nor composite · others — composite

Factor pairs of 231

4 pairs: 1 × 231 · 3 × 77 · 7 × 33 · 11 × 21

Past √231 ≈ 15.20 every pair would repeat one already found — so checking stops at 15.

231 = 3 × 7 × 11 → (1 + 1) × (1 + 1) × (1 + 1) = 8 factors: add 1 to each exponent and multiply.

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See Also

Prime Number Checker - Find out whether a given number is Prime or not
Prime Factorization - Prime Factorization Calculator
Prime Numbers List - List of all Prime Numbers - how many Prime numbers are between

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Factors of 231. Factors of 231: full list and factor pairs.

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Factors Table

Number	Factors
216	1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 27, 36, 54, 72, 108, 216
217	1, 7, 31, 217
218	1, 2, 109, 218
219	1, 3, 73, 219
220	1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220
221	1, 13, 17, 221
222	1, 2, 3, 6, 37, 74, 111, 222
223	1, 223
224	1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 112, 224
225	1, 3, 5, 9, 15, 25, 45, 75, 225
226	1, 2, 113, 226
227	1, 227
228	1, 2, 3, 4, 6, 12, 19, 38, 57, 76, 114, 228
229	1, 229
230	1, 2, 5, 10, 23, 46, 115, 230
231	1, 3, 7, 11, 21, 33, 77, 231
232	1, 2, 4, 8, 29, 58, 116, 232
233	1, 233
234	1, 2, 3, 6, 9, 13, 18, 26, 39, 78, 117, 234
235	1, 5, 47, 235
236	1, 2, 4, 59, 118, 236
237	1, 3, 79, 237
238	1, 2, 7, 14, 17, 34, 119, 238
239	1, 239
240	1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 240
241	1, 241
242	1, 2, 11, 22, 121, 242
243	1, 3, 9, 27, 81, 243
244	1, 2, 4, 61, 122, 244
245	1, 5, 7, 35, 49, 245

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FAQ

What are the Factors of 231?

Factors of 231: 1, 3, 7, 11, 21, 33, 77, 231

How many factors does 231 have?

Number 231 has 8 factors

How many Factor Pairs does 231 have?

Number 231 has 4 factor pairs

Is 231 a prime or composite number?

Composite: 231 = 3 × 7 × 11, so it has 8 factors — a prime has exactly two.

How many factors does 231 have excluding 1 and 231?

6: 3, 7, 11, 21, 33 and 77.