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Factors of 171

"Factors of a Number" Calculator

What are the Factors of 171?

Answer

Factors of 171:

1, 3, 9, 19, 57, 171

6 factors · 171 = 3² × 19 · composite

Underlined — prime: 3, 19 · 1 — neither prime nor composite · others — composite

Factor pairs of 171

3 pairs: 1 × 171 · 3 × 57 · 9 × 19

Past √171 ≈ 13.08 every pair would repeat one already found — so checking stops at 13.

171 = 3² × 19 → (2 + 1) × (1 + 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 of 171. Factors of 171: full list and factor pairs.

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Factors Table

Number	Factors
156	1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 78, 156
157	1, 157
158	1, 2, 79, 158
159	1, 3, 53, 159
160	1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160
161	1, 7, 23, 161
162	1, 2, 3, 6, 9, 18, 27, 54, 81, 162
163	1, 163
164	1, 2, 4, 41, 82, 164
165	1, 3, 5, 11, 15, 33, 55, 165
166	1, 2, 83, 166
167	1, 167
168	1, 2, 3, 4, 6, 7, 8, 12, 14, 21, 24, 28, 42, 56, 84, 168
169	1, 13, 169
170	1, 2, 5, 10, 17, 34, 85, 170
171	1, 3, 9, 19, 57, 171
172	1, 2, 4, 43, 86, 172
173	1, 173
174	1, 2, 3, 6, 29, 58, 87, 174
175	1, 5, 7, 25, 35, 175
176	1, 2, 4, 8, 11, 16, 22, 44, 88, 176
177	1, 3, 59, 177
178	1, 2, 89, 178
179	1, 179
180	1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180
181	1, 181
182	1, 2, 7, 13, 14, 26, 91, 182
183	1, 3, 61, 183
184	1, 2, 4, 8, 23, 46, 92, 184
185	1, 5, 37, 185

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FAQ

What are the Factors of 171?

Factors of 171: 1, 3, 9, 19, 57, 171

How many factors does 171 have?

Number 171 has 6 factors

How many Factor Pairs does 171 have?

Number 171 has 3 factor pairs

Is 171 a prime or composite number?

Composite: 171 = 3² × 19, so it has 6 factors — a prime has exactly two.

How many factors does 171 have excluding 1 and 171?

4: 3, 9, 19 and 57.