A:
Positive:
1 x 179874317 x 256963311 x 163522177 x 23360379 x 227689553 x 32527869 x 206992957 x 6083
Negative:
-1 x -17987431-7 x -2569633-11 x -1635221-77 x -233603-79 x -227689-553 x -32527-869 x -20699-2957 x -6083
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 17,987,431, 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 | 17,987,431 | |
| -1 | -17,987,431 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 17,987,431.
Example:
1 x 17,987,431 = 17,987,431
and
-1 x -17,987,431 = 17,987,431
Notice both answers equal 17,987,431
With that explanation out of the way, let's continue. Next, we take the number 17,987,431 and divide it by 2:
17,987,431 ÷ 2 = 8,993,715.5
If the quotient is a whole number, then 2 and 8,993,715.5 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 | 17,987,431 | |
| -1 | -17,987,431 |
Now, we try dividing 17,987,431 by 3:
17,987,431 ÷ 3 = 5,995,810.3333
If the quotient is a whole number, then 3 and 5,995,810.3333 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 | 17,987,431 | |
| -1 | -17,987,431 |
Let's try dividing by 4:
17,987,431 ÷ 4 = 4,496,857.75
If the quotient is a whole number, then 4 and 4,496,857.75 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 | 17,987,431 | |
| -1 | 17,987,431 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 77 | 79 | 553 | 869 | 2,957 | 6,083 | 20,699 | 32,527 | 227,689 | 233,603 | 1,635,221 | 2,569,633 | 17,987,431 |
| -1 | -7 | -11 | -77 | -79 | -553 | -869 | -2,957 | -6,083 | -20,699 | -32,527 | -227,689 | -233,603 | -1,635,221 | -2,569,633 | -17,987,431 |
Here are some more numbers to try:
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