Factors of 123
The factors of 123 are 1, 3, 41, 123. It has 4 factors.
Factors of 123
Pick any whole number from 1 to 10,000.
How to work it out
- 1
A factor of 123 is a whole number that divides it with nothing left over. You only need to test the numbers up to ā123 ā 11.09; every one that divides gives a pair.
- 2
The factor pairs are listed in the table below. Together they give 4 factors.
- 3
Prime factorisation: keep dividing by the smallest prime that fits.
- 4
Add all the factors: 1 + 3 + 41 + 123 = 168. Without 123 itself that is 45, so 123 is a deficient number.
LaTeX source of the formulas on this page
\[ 123 = 3 \times 41 \]
Factor pairs of 123
| Factor | Pairs with | Product |
|---|---|---|
| 1 | 123 | 1 Ć 123 = 123 |
| 3 | 41 | 3 Ć 41 = 123 |
Questions
What are the factors of 123?
The factors of 123 are 1, 3, 41, 123. It has 4 factors.
What are the prime factors of 123?
3, 41. As a product: 3 Ć 41.
How many factors does 123 have?
123 has 4 factors (2 factor pairs).
What is the sum of the factors of 123?
168.
Is 123 a prime number?
No. It is divisible by 3, so 123 = 3 Ć 41.