Factors of 40

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What are the Factors of 40?

Answer

Factors of 40:

1, 2, 4, 5, 8, 10, 20, 40

8 factors · 40 = 2³ × 5 · composite

Underlined — prime: 2, 5 · 1 — neither prime nor composite · others — composite

Factor pairs of 40

4 pairs: 1 × 40 · 2 × 20 · 4 × 10 · 5 × 8

Past √40 ≈ 6.32 every pair would repeat one already found — so checking stops at 6.

40 = 2³ × 5 → (3 + 1) × (1 + 1) = 8 factors: add 1 to each exponent and multiply.

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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

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

Is 40 a prime or composite number?

Composite: 40 = 2³ × 5, so it has 8 factors — a prime has exactly two.

How many factors does 40 have excluding 1 and 40?

6: 2, 4, 5, 8, 10 and 20.