The factors of 1155 are 1, 3, 5, 7, 11, 15, 21, 33, 35, 55, 77, 105, 165, 231, 385, and 1155. The prime factorsof 1155 are 3 x 5 x 7 x 11.
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As a product of its prime factors: 3*5*7*11 = 1155. From the given information its factors can be worked out and that 1 and 1155 are also factors
Common factors of 2850 and 1155 are: 1, 3, 5, and 15.
1155 = 3 x 5 x 7 x 11
1155 is a composite number because it has more than two factors
1155