What are the factors of 12?
1, 2, 3, 4, 6, 12
1, 2, 3, 4, 6
1, 2, 4, 6, 12, 24
1, 2, 3, 12
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Factors of 1 to 20
Factors of 1 to 20
Factors are the numbers you multiply together to get another number. Understanding factors is essential in various mathematical operations, including simplifying fractions, finding the greatest common divisors, and solving problems involving multiples and divisibility. In this guide, we will explore the factors of numbers from 1 to 20. By examining these factors, you will gain a better grasp of how numbers are interconnected and how they can be broken down into their component parts. This foundational knowledge is crucial for advancing in topics such as prime factorization, least common multiples, and algebraic expressions. Let’s delve into the factors of each number from 1 to 20.
Download Factors of 1 to 20 in PDF
Factors of 1 to 20
Download Factors of 1 to 20 in PDF
| Numbers | Factors | Prime Factors Form | Prime/Composite |
|---|---|---|---|
| 1 | 1 | 1 | Neither |
| 2 | 1, 2 | 2 | Prime |
| 3 | 1, 3 | 3 | Prime |
| 4 | 1, 2, 4 | 2² | Composite |
| 5 | 1, 5 | 5 | Prime |
| 6 | 1, 2, 3, 6 | 2 × 3 | Composite |
| 7 | 1, 7 | 7 | Prime |
| 8 | 1, 2, 4, 8 | 2³ | Composite |
| 9 | 1, 3, 9 | 3² | Composite |
| 10 | 1, 2, 5, 10 | 2 × 5 | Composite |
| 11 | 1, 11 | 11 | Prime |
| 12 | 1, 2, 3, 4, 6, 12 | 2² × 3 | Composite |
| 13 | 1, 13 | 13 | Prime |
| 14 | 1, 2, 7, 14 | 2 × 7 | Composite |
| 15 | 1, 3, 5, 15 | 3 × 5 | Composite |
| 16 | 1, 2, 4, 8, 16 | 2⁴ | Composite |
| 17 | 1, 17 | 17 | Prime |
| 18 | 1, 2, 3, 6, 9, 18 | 2 × 3² | Composite |
| 19 | 1, 19 | 19 | Prime |
| 20 | 1, 2, 4, 5, 10, 20 | 2² × 5 | Composite |
Understanding the factors of numbers from 1 to 20 is crucial for building a solid foundation in mathematics. Factors are the numbers that divide a given number exactly without leaving a remainder. For instance, the factors of 1 are just 1; for 2, they are 1 and 2; for 3, they are 1 and 3, and so forth. As numbers increase, they generally have more factors, such as 12, which has the factors 1, 2, 3, 4, 6, and 12. This exploration reveals the importance of prime numbers like 2, 3, 5, 7, 11, 13, 17, and 19, which have only two factors: 1 and themselves. By comprehending the factors of these numbers, students enhance their skills in multiplication, division, and problem-solving, which are essential for advanced mathematical concepts.
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Practice Test
Which of the following numbers has exactly four factors?
9
15
20
21
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What are the factors of 18?
1, 2, 3, 6, 9, 18
1, 2, 3, 9, 18
1, 2, 4, 6, 9
1, 3, 6, 9, 18
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Which of the following is not a factor of 20?
2
4
7
10
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What are the common factors of 16 and 20?
1, 2, 4
1, 2, 8
1, 4, 5
1, 4, 10
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What are the factors of 7?
1, 2, 7
1, 7
1, 2, 3, 7
1, 3, 7
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Which number is a factor of both 14 and 21?
2
3
7
10
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What are the factors of 10?
1, 2, 5, 10
1, 3, 5, 10
1, 2, 4, 10
1, 2, 5, 8
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How many factors does the number 1 have?
1
2
3
4
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What are the factors of 9?
1, 3, 9
1, 2, 3, 9
1, 3, 6, 9
1, 2, 4, 9
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