A:
Positive:
1 x 2864590117 x 168505319 x 1507679131 x 218671323 x 88687677 x 423132227 x 128632489 x 11509
Negative:
-1 x -28645901-17 x -1685053-19 x -1507679-131 x -218671-323 x -88687-677 x -42313-2227 x -12863-2489 x -11509
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 28,645,901, 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 | 28,645,901 | |
| -1 | -28,645,901 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 28,645,901.
Example:
1 x 28,645,901 = 28,645,901
and
-1 x -28,645,901 = 28,645,901
Notice both answers equal 28,645,901
With that explanation out of the way, let's continue. Next, we take the number 28,645,901 and divide it by 2:
28,645,901 ÷ 2 = 14,322,950.5
If the quotient is a whole number, then 2 and 14,322,950.5 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 | 28,645,901 | |
| -1 | -28,645,901 |
Now, we try dividing 28,645,901 by 3:
28,645,901 ÷ 3 = 9,548,633.6667
If the quotient is a whole number, then 3 and 9,548,633.6667 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 | 28,645,901 | |
| -1 | -28,645,901 |
Let's try dividing by 4:
28,645,901 ÷ 4 = 7,161,475.25
If the quotient is a whole number, then 4 and 7,161,475.25 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 | 28,645,901 | |
| -1 | 28,645,901 |
If you did it right, you will end up with this table:
| 1 | 17 | 19 | 131 | 323 | 677 | 2,227 | 2,489 | 11,509 | 12,863 | 42,313 | 88,687 | 218,671 | 1,507,679 | 1,685,053 | 28,645,901 |
| -1 | -17 | -19 | -131 | -323 | -677 | -2,227 | -2,489 | -11,509 | -12,863 | -42,313 | -88,687 | -218,671 | -1,507,679 | -1,685,053 | -28,645,901 |
Here are some more numbers to try:
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