Factors of 1980

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What are the Factors of 1,980?

Answer

Factors of 1,980:
36 factors: 1, 2, 3, 4, 5 … 660, 990, 1980
all 36 factors

1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 30, 33, 36, 44, 45, 55, 60, 66, 90, 99, 110, 132, 165, 180, 198, 220, 330, 396, 495, 660, 990, 1980

36 factors · 1980 = 22 × 32 × 5 × 11 · composite

Underlined — prime: 2, 3, 5, 11 · 1 — neither prime nor composite · others — composite

Factor pairs of 1,980

  • 1 × 1980
  • 2 × 990
  • 3 × 660
  • 4 × 495
  • 5 × 396
  • 6 × 330
  • 9 × 220
  • 10 × 198

√1980 ≈ 44.50 — the last pair 44 × 45 sits here; past it pairs repeat.

all 18 pairs
  • 1 × 1980
  • 2 × 990
  • 3 × 660
  • 4 × 495
  • 5 × 396
  • 6 × 330
  • 9 × 220
  • 10 × 198
  • 11 × 180
  • 12 × 165
  • 15 × 132
  • 18 × 110
  • 20 × 99
  • 22 × 90
  • 30 × 66
  • 33 × 60
  • 36 × 55
  • 44 × 45

1980 = 22 × 32 × 5 × 11 → (2 + 1) × (2 + 1) × (1 + 1) × (1 + 1) = 36 factors: add 1 to each exponent and multiply.

Related Calculations

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Factors Table

NumberFactors
1,9151, 5, 383, 1915
1,9201, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 60, 64, 80, 96, 120, 128, 160, 192, 240, 320, 384, 480, 640, 960, 1920
1,9211, 17, 113, 1921
1,9251, 5, 7, 11, 25, 35, 55, 77, 175, 275, 385, 1925
1,9261, 2, 3, 6, 9, 18, 107, 214, 321, 642, 963, 1926
1,9301, 2, 5, 10, 193, 386, 965, 1930
1,9351, 3, 5, 9, 15, 43, 45, 129, 215, 387, 645, 1935
1,9401, 2, 4, 5, 10, 20, 97, 194, 388, 485, 970, 1940
1,9451, 5, 389, 1945
1,9501, 2, 3, 5, 6, 10, 13, 15, 25, 26, 30, 39, 50, 65, 75, 78, 130, 150, 195, 325, 390, 650, 975, 1950
1,9551, 5, 17, 23, 85, 115, 391, 1955
1,9601, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 980, 1960
1,9651, 3, 5, 15, 131, 393, 655, 1965
1,9701, 2, 5, 10, 197, 394, 985, 1970
1,9751, 5, 25, 79, 395, 1975
1,9801, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 30, 33, 36, 44, 45, 55, 60, 66, 90, 99, 110, 132, 165, 180, 198, 220, 330, 396, 495, 660, 990, 1980
1,9851, 5, 397, 1985
1,9901, 2, 5, 10, 199, 398, 995, 1990
1,9951, 3, 5, 7, 15, 19, 21, 35, 57, 95, 105, 133, 285, 399, 665, 1995
2,0001, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 1000, 2000
2,0051, 5, 401, 2005
2,0101, 2, 3, 5, 6, 10, 15, 30, 67, 134, 201, 335, 402, 670, 1005, 2010
2,0151, 5, 13, 31, 65, 155, 403, 2015
2,0161, 2, 3, 4, 6, 7, 8, 9, 12, 14, 16, 18, 21, 24, 28, 32, 36, 42, 48, 56, 63, 72, 84, 96, 112, 126, 144, 168, 224, 252, 288, 336, 504, 672, 1008, 2016
2,0201, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010, 2020
2,0211, 43, 47, 2021
2,0221, 2, 3, 6, 337, 674, 1011, 2022
2,0231, 7, 17, 119, 289, 2023
2,0241, 2, 4, 8, 11, 22, 23, 44, 46, 88, 92, 184, 253, 506, 1012, 2024
2,0251, 3, 5, 9, 15, 25, 27, 45, 75, 81, 135, 225, 405, 675, 2025

FAQ

What are the Factors of 1,980?

Factors of 1,980: 36 factors: 1, 2, 3, 4, 5 … 660, 990, 1980

How many factors does 1,980 have?

Number 1,980 has 36 factors

How many Factor Pairs does 1,980 have?

Number 1,980 has 18 factor pairs

Is 1,980 a prime or composite number?

Composite: 1980 = 2² × 3² × 5 × 11, so it has 36 factors — a prime has exactly two.

How many factors does 1,980 have excluding 1 and 1,980?

34 — all 36 factors except 1 and 1,980.

See Also