Factors of 55

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What are the Factors of 55?

Answer

Factors of 55:

1, 5, 11, 55

4 factors · 55 = 5 × 11 · composite

Underlined — prime: 5, 11 · 1 — neither prime nor composite · others — composite

Factor pairs of 55

2 pairs: 1 × 55 · 5 × 11

Past √55 ≈ 7.42 every pair would repeat one already found — so checking stops at 7.

55 = 5 × 11 → (1 + 1) × (1 + 1) = 4 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
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
55	1, 5, 11, 55
56	1, 2, 4, 7, 8, 14, 28, 56
57	1, 3, 19, 57
58	1, 2, 29, 58
59	1, 59
60	1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60
61	1, 61
62	1, 2, 31, 62
63	1, 3, 7, 9, 21, 63
64	1, 2, 4, 8, 16, 32, 64
65	1, 5, 13, 65
66	1, 2, 3, 6, 11, 22, 33, 66
67	1, 67
68	1, 2, 4, 17, 34, 68
69	1, 3, 23, 69

FAQ

What are the Factors of 55?

Factors of 55: 1, 5, 11, 55

How many factors does 55 have?

Number 55 has 4 factors

How many Factor Pairs does 55 have?

Number 55 has 2 factor pairs

Is 55 a prime or composite number?

Composite: 55 = 5 × 11, so it has 4 factors — a prime has exactly two.

How many factors does 55 have excluding 1 and 55?

2: 5 and 11.