Factors of 221

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What are the Factors of 221?

Answer

Factors of 221:

1, 13, 17, 221

4 factors · 221 = 13 × 17 · composite

Underlined — prime: 13, 17 · 1 — neither prime nor composite · others — composite

Factor pairs of 221

2 pairs: 1 × 221 · 13 × 17

Past √221 ≈ 14.87 every pair would repeat one already found — so checking stops at 14.

221 = 13 × 17 → (1 + 1) × (1 + 1) = 4 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
206	1, 2, 103, 206
207	1, 3, 9, 23, 69, 207
208	1, 2, 4, 8, 13, 16, 26, 52, 104, 208
209	1, 11, 19, 209
210	1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 70, 105, 210
211	1, 211
212	1, 2, 4, 53, 106, 212
213	1, 3, 71, 213
214	1, 2, 107, 214
215	1, 5, 43, 215
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

FAQ

What are the Factors of 221?

Factors of 221: 1, 13, 17, 221

How many factors does 221 have?

Number 221 has 4 factors

How many Factor Pairs does 221 have?

Number 221 has 2 factor pairs

Is 221 a prime or composite number?

Composite: 221 = 13 × 17, so it has 4 factors — a prime has exactly two.

How many factors does 221 have excluding 1 and 221?

2: 13 and 17.