Factors of 40

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Factors of

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.

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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

Factors of

Factors Table

NumberFactors
251, 5, 25
261, 2, 13, 26
271, 3, 9, 27
281, 2, 4, 7, 14, 28
291, 29
301, 2, 3, 5, 6, 10, 15, 30
311, 31
321, 2, 4, 8, 16, 32
331, 3, 11, 33
341, 2, 17, 34
351, 5, 7, 35
361, 2, 3, 4, 6, 9, 12, 18, 36
371, 37
381, 2, 19, 38
391, 3, 13, 39
401, 2, 4, 5, 8, 10, 20, 40
411, 41
421, 2, 3, 6, 7, 14, 21, 42
431, 43
441, 2, 4, 11, 22, 44
451, 3, 5, 9, 15, 45
461, 2, 23, 46
471, 47
481, 2, 3, 4, 6, 8, 12, 16, 24, 48
491, 7, 49
501, 2, 5, 10, 25, 50
511, 3, 17, 51
521, 2, 4, 13, 26, 52
531, 53
541, 2, 3, 6, 9, 18, 27, 54

FAQ

What are the Factors of 40?

Factors of 40: 1, 2, 4, 5, 8, 10, 20, 40

How many factors does 40 have?

Number 40 has 8 factors

How many Factor Pairs does 40 have?

Number 40 has 4 factor pairs

See Also