Factors of 8421
The factors of 8421 are 1, 3, 7, 21, 401, 1203, 2807, 8421. It has 8 factors.
Pick any whole number from 1 to 10,000.
How to work it out
- 1
A factor of 8421 is a whole number that divides it with nothing left over. You only need to test the numbers up to √8421 ≈ 91.77; every one that divides gives a pair.
- 2
The factor pairs are listed in the table below. Together they give 8 factors.
- 3
Prime factorisation: keep dividing by the smallest prime that fits.
- 4
Add all the factors: 1 + 3 + 7 + 21 + 401 + 1203 + 2807 + 8421 = 12864. Without 8421 itself that is 4443, so 8421 is a deficient number.
LaTeX source of the formulas on this page
\[ 8421 = 3 \times 7 \times 401 \]
Factor pairs of 8421
| Factor | Pairs with | Product |
|---|---|---|
| 1 | 8421 | 1 × 8421 = 8421 |
| 3 | 2807 | 3 × 2807 = 8421 |
| 7 | 1203 | 7 × 1203 = 8421 |
| 21 | 401 | 21 × 401 = 8421 |
Questions
What are the factors of 8421?
The factors of 8421 are 1, 3, 7, 21, 401, 1203, 2807, 8421. It has 8 factors.
What are the prime factors of 8421?
3, 7, 401. As a product: 3 × 7 × 401.
How many factors does 8421 have?
8421 has 8 factors (4 factor pairs).
What is the sum of the factors of 8421?
12864.
Is 8421 a prime number?
No. It is divisible by 3, so 8421 = 3 × 2807.