1, 3, 9, 17, 51, 153
1, 3, 9, 17, 27, 51, 153, 459
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1, 2, 3, 4, 6, 9, 12, 17, 18, 27, 34, 36, 51, 54, 68, 102, 108, 153, 204, 306, 459, 612, 918, 1836 2, 3 and 17 are prime.
The factors of 44 are: 1, 2, 4, 11, 22, 44 The factors of 153 are: 1, 3, 9, 17, 51, 153 Other than 1, there are no positive integer common factors between the two numbers.
Short answer: There are none. There is neither a greatest common factor nor common factors of a single number, such as 145, because there cannot be any form of common factor without two or more numbers to compare. Common factors are factors that the numbers being compared have in common. The greatest common factor is the largest factor that all the numbers being compared have in common. Thus, since there are not two or more numbers to compare, there are neither common factors nor a greatest common factor. The factors of 145 are 1, 5, 29, and 145. Examples: The common factors of 30 and 145 are 1 and 5; the greatest common factor is 5. The common factors of 145 and 149 are only 1; the greatest common factor is 1. The common factors of 145 and 174 are 1 and 29; the greatest common factor is 29.
1, 3, 9, 11, 17, 27, 33, 51, 99, 153, 187, 289, 297, 459, 561, 867, 1683, 2601, 3179, 5049, 7803, 9537, 28611, 85833
All the multiples of 153 (which are infinite) starting with: 153, 306, 459, 612, 765, 918 . . .