A:
Positive:
1 x 281981155 x 563962311 x 256346523 x 122600555 x 512693115 x 245201253 x 1114551265 x 22291
Negative:
-1 x -28198115-5 x -5639623-11 x -2563465-23 x -1226005-55 x -512693-115 x -245201-253 x -111455-1265 x -22291
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 28,198,115, 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 | 28,198,115 | |
| -1 | -28,198,115 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 28,198,115.
Example:
1 x 28,198,115 = 28,198,115
and
-1 x -28,198,115 = 28,198,115
Notice both answers equal 28,198,115
With that explanation out of the way, let's continue. Next, we take the number 28,198,115 and divide it by 2:
28,198,115 ÷ 2 = 14,099,057.5
If the quotient is a whole number, then 2 and 14,099,057.5 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 | 28,198,115 | |
| -1 | -28,198,115 |
Now, we try dividing 28,198,115 by 3:
28,198,115 ÷ 3 = 9,399,371.6667
If the quotient is a whole number, then 3 and 9,399,371.6667 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 | 28,198,115 | |
| -1 | -28,198,115 |
Let's try dividing by 4:
28,198,115 ÷ 4 = 7,049,528.75
If the quotient is a whole number, then 4 and 7,049,528.75 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 | 28,198,115 | |
| -1 | 28,198,115 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 23 | 55 | 115 | 253 | 1,265 | 22,291 | 111,455 | 245,201 | 512,693 | 1,226,005 | 2,563,465 | 5,639,623 | 28,198,115 |
| -1 | -5 | -11 | -23 | -55 | -115 | -253 | -1,265 | -22,291 | -111,455 | -245,201 | -512,693 | -1,226,005 | -2,563,465 | -5,639,623 | -28,198,115 |
Here are some more numbers to try:
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