A:
Positive:
1 x 2878321817 x 4111888313 x 2214093791 x 3162991169 x 1703149467 x 616343521 x 5524611183 x 2433073269 x 880493647 x 789236071 x 474116773 x 42497
Negative:
-1 x -287832181-7 x -41118883-13 x -22140937-91 x -3162991-169 x -1703149-467 x -616343-521 x -552461-1183 x -243307-3269 x -88049-3647 x -78923-6071 x -47411-6773 x -42497
Unfortunately, there's not simple formula to identifying all of the factors of a number and it can be a tedious process when trying to identify the divisors of larger numbers. To find the factor combinations of the number 287,832,181, it is easier to work with a table - it's called factoring from the outside in.
We start by creating a table and writing 1 on the left side and then the number we're trying to find the factors for on the right side in a table. Then, below that, write the numbers as a negative as well.
| 1 | 287,832,181 | |
| -1 | -287,832,181 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 287,832,181.
Example:
1 x 287,832,181 = 287,832,181
and
-1 x -287,832,181 = 287,832,181
Notice both answers equal 287,832,181
With that explanation out of the way, let's continue. Next, we take the number 287,832,181 and divide it by 2:
287,832,181 ÷ 2 = 143,916,090.5
If the quotient is a whole number, then 2 and 143,916,090.5 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 287,832,181 | |
| -1 | -287,832,181 |
Now, we try dividing 287,832,181 by 3:
287,832,181 ÷ 3 = 95,944,060.3333
If the quotient is a whole number, then 3 and 95,944,060.3333 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 287,832,181 | |
| -1 | -287,832,181 |
Let's try dividing by 4:
287,832,181 ÷ 4 = 71,958,045.25
If the quotient is a whole number, then 4 and 71,958,045.25 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 287,832,181 | |
| -1 | 287,832,181 |
If you did it right, you will end up with this table:
| 1 | 7 | 13 | 91 | 169 | 467 | 521 | 1,183 | 3,269 | 3,647 | 6,071 | 6,773 | 42,497 | 47,411 | 78,923 | 88,049 | 243,307 | 552,461 | 616,343 | 1,703,149 | 3,162,991 | 22,140,937 | 41,118,883 | 287,832,181 |
| -1 | -7 | -13 | -91 | -169 | -467 | -521 | -1,183 | -3,269 | -3,647 | -6,071 | -6,773 | -42,497 | -47,411 | -78,923 | -88,049 | -243,307 | -552,461 | -616,343 | -1,703,149 | -3,162,991 | -22,140,937 | -41,118,883 | -287,832,181 |
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