Factors of 1155

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What are the Factors of 1,155?

Answer

Factors of 1,155:
1, 3, 5, 7, 11, 15, 21, 33, 35, 55, 77, 105, 165, 231, 385, 1155

16 factors · 1155 = 3 × 5 × 7 × 11 · composite

Underlined — prime: 3, 5, 7, 11 · 1 — neither prime nor composite · others — composite

Factor pairs of 1,155

  • 1 × 1155
  • 3 × 385
  • 5 × 231
  • 7 × 165
  • 11 × 105
  • 15 × 77
  • 21 × 55
  • 33 × 35

√1155 ≈ 33.99 — the last pair 33 × 35 sits here; past it pairs repeat.

1155 = 3 × 5 × 7 × 11 → (1 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 16 factors: add 1 to each exponent and multiply.

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Factors Table

NumberFactors
1,0801, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 36, 40, 45, 54, 60, 72, 90, 108, 120, 135, 180, 216, 270, 360, 540, 1080
1,0851, 5, 7, 31, 35, 155, 217, 1085
1,0901, 2, 5, 10, 109, 218, 545, 1090
1,0951, 3, 5, 15, 73, 219, 365, 1095
1,1001, 2, 4, 5, 10, 11, 20, 22, 25, 44, 50, 55, 100, 110, 220, 275, 550, 1100
1,1051, 5, 13, 17, 65, 85, 221, 1105
1,1101, 2, 3, 5, 6, 10, 15, 30, 37, 74, 111, 185, 222, 370, 555, 1110
1,1151, 5, 223, 1115
1,1201, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 70, 80, 112, 140, 160, 224, 280, 560, 1120
1,1251, 3, 5, 9, 15, 25, 45, 75, 125, 225, 375, 1125
1,1301, 2, 5, 10, 113, 226, 565, 1130
1,1351, 5, 227, 1135
1,1401, 2, 3, 4, 5, 6, 10, 12, 15, 19, 20, 30, 38, 57, 60, 76, 95, 114, 190, 228, 285, 380, 570, 1140
1,1451, 5, 229, 1145
1,1501, 2, 5, 10, 23, 25, 46, 50, 115, 230, 575, 1150
1,1551, 3, 5, 7, 11, 15, 21, 33, 35, 55, 77, 105, 165, 231, 385, 1155
1,1601, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 145, 232, 290, 580, 1160
1,1651, 5, 233, 1165
1,1671, 3, 389, 1167
1,1701, 2, 3, 5, 6, 9, 10, 13, 15, 18, 26, 30, 39, 45, 65, 78, 90, 117, 130, 195, 234, 390, 585, 1170
1,1751, 5, 25, 47, 235, 1175
1,1801, 2, 4, 5, 10, 20, 59, 118, 236, 295, 590, 1180
1,1851, 3, 5, 15, 79, 237, 395, 1185
1,1901, 2, 5, 7, 10, 14, 17, 34, 35, 70, 85, 119, 170, 238, 595, 1190
1,1951, 5, 239, 1195
1,2001, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 25, 30, 40, 48, 50, 60, 75, 80, 100, 120, 150, 200, 240, 300, 400, 600, 1200
1,2051, 5, 241, 1205
1,2101, 2, 5, 10, 11, 22, 55, 110, 121, 242, 605, 1210
1,2151, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 1215
1,2201, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220

FAQ

What are the Factors of 1,155?

Factors of 1,155: 1, 3, 5, 7, 11, 15, 21, 33, 35, 55, 77, 105, 165, 231, 385, 1155

How many factors does 1,155 have?

Number 1,155 has 16 factors

How many Factor Pairs does 1,155 have?

Number 1,155 has 8 factor pairs

Is 1,155 a prime or composite number?

Composite: 1155 = 3 × 5 × 7 × 11, so it has 16 factors — a prime has exactly two.

How many factors does 1,155 have excluding 1 and 1,155?

14: 3, 5, 7, 11, 15, 21, 33, 35, 55, 77, 105, 165, 231 and 385.

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