How to use the Factor Calculator
The factor calculator lists all factors of a whole number and tells you if it is prime.
What you need to enter
- Whole number
The formula
A factor divides the number with no remainder. Test divisors up to the square root.
Worked example
Using the default values in the calculator:
- Whole number: 360
| Factors | 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 72, 90, 120, 180, 360 |
| Count | 24 |
| Prime? | No |
Tips for better results
- A prime has exactly two factors.
- Factors come in pairs.
Common mistakes to avoid
- Forgetting 1 and the number itself.
- Entering decimals.