The factors of 155 are 1, 5, 31 and 155. That is 4 factors in total.
A factor of 155 is a whole number that divides 155 exactly, with no remainder. 155 is a composite number because it has factors other than 1 and itself.
Two numbers that multiply to give 155:
155 = 5 × 31. The prime factors of 155 are 5 and 31.
| Number | Factors |
|---|---|
| 151 | 1, 151 |
| 152 | 1, 2, 4, 8, 19, 38, 76, 152 |
| 153 | 1, 3, 9, 17, 51, 153 |
| 154 | 1, 2, 7, 11, 14, 22, 77, 154 |
| 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 |
More about 155: square root of 155 · 155 in binary.
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