The factors of 28 are 1, 2, 4, 7, 14 and 28. That is 6 factors in total.
A factor of 28 is a whole number that divides 28 exactly, with no remainder. 28 is a composite number because it has factors other than 1 and itself.
Two numbers that multiply to give 28:
28 = 2 × 2 × 7 = 2² × 7. The prime factors of 28 are 2 and 7.
| Number | Factors |
|---|---|
| 24 | 1, 2, 3, 4, 6, 8, 12, 24 |
| 25 | 1, 5, 25 |
| 26 | 1, 2, 13, 26 |
| 27 | 1, 3, 9, 27 |
| 29 | 1, 29 |
| 30 | 1, 2, 3, 5, 6, 10, 15, 30 |
| 31 | 1, 31 |
| 32 | 1, 2, 4, 8, 16, 32 |
More about 28: 28 squared · square root of 28 · 28 in binary · 28 in Roman numerals.
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