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Factors of 225

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What are the Factors of 225?

Answer

Factors of 225:

1, 3, 5, 9, 15, 25, 45, 75, 225

9 factors · 225 = 3² × 5² · composite

Underlined — prime: 3, 5 · 1 — neither prime nor composite · others — composite

Factor pairs of 225

5 pairs: 1 × 225 · 3 × 75 · 5 × 45 · 9 × 25 · 15 × 15

15 × 15 is a pair of one factor — that is why 225 has an odd number of factors, 9.

225 = 3² × 5² → (2 + 1) × (2 + 1) = 9 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 225. Factors of 225: full list and factor pairs.

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Factors Table

Number	Factors
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
236	1, 2, 4, 59, 118, 236
237	1, 3, 79, 237
238	1, 2, 7, 14, 17, 34, 119, 238
239	1, 239

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FAQ

What are the Factors of 225?

Factors of 225: 1, 3, 5, 9, 15, 25, 45, 75, 225

How many factors does 225 have?

Number 225 has 9 factors

How many Factor Pairs does 225 have?

Number 225 has 5 factor pairs

Is 225 a prime or composite number?

Composite: 225 = 3² × 5², so it has 9 factors — a prime has exactly two.

How many factors does 225 have excluding 1 and 225?

7: 3, 5, 9, 15, 25, 45 and 75.

Why does 225 have an odd number of factors?

225 is a perfect square: in the pair 15 × 15 the factor 15 pairs with itself, so the 9 factors are 4 pairs plus 15.