Factors of 40
"Factors of a Number" Calculator
What are the Factors of 40?
Answer
Factors of 40:
1, 2, 4, 5, 8, 10, 20, 40
(number 40 has 8 factors)
Factor Pairs of 40
A Factor Pair of number 40 is a combination of two factors which can be multiplied together to equal 40.
List of all possible Factor Pairs of 40:
- 1 × 40 = 40
- 2 × 20 = 40
- 4 × 10 = 40
- 5 × 8 = 40
How to find the Factors of 40
Divide 40 by every whole number from 1 up to 6. Each division without a remainder gives a factor and its pair. There is no point going further: 7 × 7 = 49 is already greater than 40, so any larger divisor would pair with a smaller one you have already checked.
- 40 ÷ 1 = 40 — factors 1 and 40
- 40 ÷ 2 = 20 — factors 2 and 20
- 40 ÷ 3 — remainder 1, not a factor
- 40 ÷ 4 = 10 — factors 4 and 10
- 40 ÷ 5 = 8 — factors 5 and 8
- 40 ÷ 6 — remainder 4, not a factor
Why 40 has exactly 8 factors
The count follows from the prime factorization: add 1 to each exponent and multiply. Counting the divisors this way needs no trial division at all, however large the number is.
40 = 23 × 5
(3 + 1) × (1 + 1) = 8
Step-by-step factorization: Prime factors of 40.
Found an error in the calculation or the information?
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See Also
- Prime Number Checker - Find out whether a given number is Prime or not
- Prime Factorization - Prime Factorization Calculator
- Prime Numbers List - List of all Prime Numbers - how many Prime numbers are between
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Factors Table
| Number | Factors |
|---|---|
| 25 | 1, 5, 25 |
| 26 | 1, 2, 13, 26 |
| 27 | 1, 3, 9, 27 |
| 28 | 1, 2, 4, 7, 14, 28 |
| 29 | 1, 29 |
| 30 | 1, 2, 3, 5, 6, 10, 15, 30 |
| 31 | 1, 31 |
| 32 | 1, 2, 4, 8, 16, 32 |
| 33 | 1, 3, 11, 33 |
| 34 | 1, 2, 17, 34 |
| 35 | 1, 5, 7, 35 |
| 36 | 1, 2, 3, 4, 6, 9, 12, 18, 36 |
| 37 | 1, 37 |
| 38 | 1, 2, 19, 38 |
| 39 | 1, 3, 13, 39 |
| 40 | 1, 2, 4, 5, 8, 10, 20, 40 |
| 41 | 1, 41 |
| 42 | 1, 2, 3, 6, 7, 14, 21, 42 |
| 43 | 1, 43 |
| 44 | 1, 2, 4, 11, 22, 44 |
| 45 | 1, 3, 5, 9, 15, 45 |
| 46 | 1, 2, 23, 46 |
| 47 | 1, 47 |
| 48 | 1, 2, 3, 4, 6, 8, 12, 16, 24, 48 |
| 49 | 1, 7, 49 |
| 50 | 1, 2, 5, 10, 25, 50 |
| 51 | 1, 3, 17, 51 |
| 52 | 1, 2, 4, 13, 26, 52 |
| 53 | 1, 53 |
| 54 | 1, 2, 3, 6, 9, 18, 27, 54 |
About "Factors of a Number" Calculator
This calculator will help you find all factors of a given number. For example, it can help you find out what are the Factors of 40? (The answer is: 1, 2, 4, 5, 8, 10, 20, 40). Pick the number (e.g. '40'). After that hit the 'Find' button.
The Factors of a number are numbers that divides initial number evenly, with no remainder
"Factors of a Number" Calculator