Factorials Table
Table of factorials from 0! to 25! with exact values, digit count, and scientific notation.
| n | n! (Factorial) | Digits | Scientific Notation |
|---|---|---|---|
| 0 | 1 | 1 | |
| 1 | 1 | 1 | |
| 2 | 2 | 1 | |
| 3 | 6 | 1 | |
| 4 | 24 | 2 | |
| 5 | 120 | 3 | |
| 6 | 720 | 3 | |
| 7 | 5040 | 4 | |
| 8 | 40320 | 5 | |
| 9 | 362880 | 6 | |
| 10 | 3628800 | 7 | ≈ 3.6288 × 10^6 |
| 11 | 39916800 | 8 | ≈ 3.9916 × 10^7 |
| 12 | 479001600 | 9 | ≈ 4.7900 × 10^8 |
| 13 | 6227020800 | 10 | ≈ 6.2270 × 10^9 |
| 14 | 87178291200 | 11 | ≈ 8.7178 × 10^10 |
| 15 | 1307674368000 | 13 | ≈ 1.3076 × 10^12 |
| 16 | 20922789888000 | 14 | ≈ 2.0922 × 10^13 |
| 17 | 355687428096000 | 15 | ≈ 3.5568 × 10^14 |
| 18 | 6402373705728000 | 16 | ≈ 6.4023 × 10^15 |
| 19 | 121645100408832000 | 18 | ≈ 1.2164 × 10^17 |
| 20 | 2432902008176640000 | 19 | ≈ 2.4329 × 10^18 |
| 21 | 51090942171709440000 | 20 | ≈ 5.1090 × 10^19 |
| 22 | 1124000727777607680000 | 22 | ≈ 1.1240 × 10^21 |
| 23 | 25852016738884976640000 | 23 | ≈ 2.5852 × 10^22 |
| 24 | 620448401733239439360000 | 24 | ≈ 6.2044 × 10^23 |
| 25 | 15511210043330985984000000 | 26 | ≈ 1.5511 × 10^25 |
How to Use the Factorials Table
- Browse the reference table to find the values you need.
- Use search or scroll to locate specific entries.
- Click on a value to copy it or see more details.
- Use the table as a quick reference during calculations or study.
Schnellreferenz
| Von | Nach |
|---|---|
| 1 × 1 | 1 |
| 5 × 5 | 25 |
| 7 × 8 | 56 |
| 9 × 9 | 81 |
| 12 × 12 | 144 |
| 15 × 15 | 225 |
Anwendungsfälle
- •Quick lookup of values during math class or professional work.
- •Verifying calculations without needing a full scientific calculator.
- •Studying mathematical relationships, patterns, and properties.
- •Using as a handy reference during engineering or science tasks.
Formel
The factorial of n (written n!) is the product of all positive integers up to n: n! = 1 × 2 × 3 × ... × n. By definition, 0! = 1.
Häufig gestellte Fragen
What is a factorial?
A factorial (n!) is the product of all positive integers from 1 to n. For example, 5! = 1 × 2 × 3 × 4 × 5 = 120. By convention, 0! = 1.
Why does 0! equal 1?
By definition, 0! = 1. This is because the empty product (multiplying zero numbers together) equals 1, and it ensures the recursive formula n! = n × (n−1)! works for n = 1.
How fast do factorials grow?
Factorials grow extremely fast — faster than exponential functions. 10! = 3,628,800 (7 digits), 20! = 2,432,902,008,176,640,000 (19 digits), and 25! has 26 digits.
Where are factorials used?
Factorials appear in combinatorics (permutations and combinations), probability, Taylor series, and many areas of mathematics. The number of ways to arrange n items is n!.