The common factors of 220 and 284 are the numbers that can evenly divide both 220 and 284 without leaving a remainder. To find the common factors, we first need to find the prime factorization of each number. The prime factorization of 220 is 2^2 * 5 * 11, and the prime factorization of 284 is 2^2 * 71. The common factors of 220 and 284 are the numbers that appear in both factorizations, which are 2 and 4.
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1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220 1, 2, 4, 71, 142, 284
factors of 284 are 1, 2, 4, 71, 142, 284
The factors of 284 are 1, 2, 4, 71, 142, and 284. The prime factors of 284 are 2 x 2 x 71.1, 2, 4, 71, 142, 284
The GCF of 198 and 220 is 22. The factors of 198 are 1, 2, 3, 6, 9, 11, 18, 22, 33, 66, 99, and 198. The factors of 220 are 1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, and 220. Therefore, the greatest common factor of 198 and 220 is 22. Another way to determine this is to determine the prime factors of each. The prime factors of 198 are 2, 3, 3, and 11. The prime factors of 220 are 2, 2, 5, and 11. The factors they have in common are one 2 and the 11, so their greatest common factor is the product 2 x 11 = 22.
The prime factors of 220 are: 2,5,11