Factors of 243

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What are the factors of 243?

Answer

Factors of 243:

1, 3, 9, 27, 81, 243

6 factors · 243 = 3⁵ · composite

Underlined — prime: 3 · 1 — neither prime nor composite · others — composite

Factor pairs of 243

3 pairs: 1 × 243 · 3 × 81 · 9 × 27

Past √243 ≈ 15.59 every pair would repeat one already found — so checking stops at 15.

243 = 3⁵ → (5 + 1) = 6 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 Table

Number	Factors
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
246	1, 2, 3, 6, 41, 82, 123, 246
247	1, 13, 19, 247
248	1, 2, 4, 8, 31, 62, 124, 248
249	1, 3, 83, 249
250	1, 2, 5, 10, 25, 50, 125, 250
251	1, 251
252	1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, 126, 252
253	1, 11, 23, 253
254	1, 2, 127, 254
255	1, 3, 5, 15, 17, 51, 85, 255
256	1, 2, 4, 8, 16, 32, 64, 128, 256
257	1, 257

FAQ

What are the factors of 243?

Factors of 243: 1, 3, 9, 27, 81, 243

How many factors does 243 have?

Number 243 has 6 factors

How many factor pairs does 243 have?

Number 243 has 3 factor pairs

Is 243 a prime or composite number?

Composite: 243 = 3⁵, so it has 6 factors — a prime has exactly two.

How many factors does 243 have excluding 1 and 243?

4: 3, 9, 27 and 81.