A:
Positive:
1 x 281800255 x 563600525 x 112720129 x 97172547 x 599575145 x 194345235 x 119915725 x 38869827 x 340751175 x 239831363 x 206754135 x 6815
Negative:
-1 x -28180025-5 x -5636005-25 x -1127201-29 x -971725-47 x -599575-145 x -194345-235 x -119915-725 x -38869-827 x -34075-1175 x -23983-1363 x -20675-4135 x -6815
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 28,180,025, 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 | 28,180,025 | |
| -1 | -28,180,025 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 28,180,025.
Example:
1 x 28,180,025 = 28,180,025
and
-1 x -28,180,025 = 28,180,025
Notice both answers equal 28,180,025
With that explanation out of the way, let's continue. Next, we take the number 28,180,025 and divide it by 2:
28,180,025 ÷ 2 = 14,090,012.5
If the quotient is a whole number, then 2 and 14,090,012.5 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 | 28,180,025 | |
| -1 | -28,180,025 |
Now, we try dividing 28,180,025 by 3:
28,180,025 ÷ 3 = 9,393,341.6667
If the quotient is a whole number, then 3 and 9,393,341.6667 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 | 28,180,025 | |
| -1 | -28,180,025 |
Let's try dividing by 4:
28,180,025 ÷ 4 = 7,045,006.25
If the quotient is a whole number, then 4 and 7,045,006.25 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 | 28,180,025 | |
| -1 | 28,180,025 |
If you did it right, you will end up with this table:
| 1 | 5 | 25 | 29 | 47 | 145 | 235 | 725 | 827 | 1,175 | 1,363 | 4,135 | 6,815 | 20,675 | 23,983 | 34,075 | 38,869 | 119,915 | 194,345 | 599,575 | 971,725 | 1,127,201 | 5,636,005 | 28,180,025 |
| -1 | -5 | -25 | -29 | -47 | -145 | -235 | -725 | -827 | -1,175 | -1,363 | -4,135 | -6,815 | -20,675 | -23,983 | -34,075 | -38,869 | -119,915 | -194,345 | -599,575 | -971,725 | -1,127,201 | -5,636,005 | -28,180,025 |
Here are some more numbers to try:
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