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Factors of 820

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What are the Factors of 820?

Answer

Factors of 820:

1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820

12 factors · 820 = 2² × 5 × 41 · composite

Underlined — prime: 2, 5, 41 · 1 — neither prime nor composite · others — composite

Factor pairs of 820

6 pairs: 1 × 820 · 2 × 410 · 4 × 205 · 5 × 164 · 10 × 82 · 20 × 41

Past √820 ≈ 28.64 every pair would repeat one already found — so checking stops at 28.

820 = 2² × 5 × 41 → (2 + 1) × (1 + 1) × (1 + 1) = 12 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 of 820. Factors of 820: full list and factor pairs.

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Factors Table

Number	Factors
805	1, 5, 7, 23, 35, 115, 161, 805
806	1, 2, 13, 26, 31, 62, 403, 806
807	1, 3, 269, 807
808	1, 2, 4, 8, 101, 202, 404, 808
809	1, 809
810	1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 54, 81, 90, 135, 162, 270, 405, 810
811	1, 811
812	1, 2, 4, 7, 14, 28, 29, 58, 116, 203, 406, 812
813	1, 3, 271, 813
814	1, 2, 11, 22, 37, 74, 407, 814
815	1, 5, 163, 815
816	1, 2, 3, 4, 6, 8, 12, 16, 17, 24, 34, 48, 51, 68, 102, 136, 204, 272, 408, 816
817	1, 19, 43, 817
818	1, 2, 409, 818
819	1, 3, 7, 9, 13, 21, 39, 63, 91, 117, 273, 819
820	1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820
821	1, 821
822	1, 2, 3, 6, 137, 274, 411, 822
823	1, 823
824	1, 2, 4, 8, 103, 206, 412, 824
825	1, 3, 5, 11, 15, 25, 33, 55, 75, 165, 275, 825
826	1, 2, 7, 14, 59, 118, 413, 826
827	1, 827
828	1, 2, 3, 4, 6, 9, 12, 18, 23, 36, 46, 69, 92, 138, 207, 276, 414, 828
829	1, 829
830	1, 2, 5, 10, 83, 166, 415, 830
831	1, 3, 277, 831
832	1, 2, 4, 8, 13, 16, 26, 32, 52, 64, 104, 208, 416, 832
833	1, 7, 17, 49, 119, 833
834	1, 2, 3, 6, 139, 278, 417, 834

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FAQ

What are the Factors of 820?

Factors of 820: 1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820

How many factors does 820 have?

Number 820 has 12 factors

How many Factor Pairs does 820 have?

Number 820 has 6 factor pairs

Is 820 a prime or composite number?

Composite: 820 = 2² × 5 × 41, so it has 12 factors — a prime has exactly two.

How many factors does 820 have excluding 1 and 820?

10: 2, 4, 5, 10, 20, 41, 82, 164, 205 and 410.