A:
Positive:
1 x 218272255 x 43654457 x 311817525 x 87308935 x 62363537 x 589925175 x 124727185 x 117985259 x 84275925 x 235971295 x 168553371 x 6475
Negative:
-1 x -21827225-5 x -4365445-7 x -3118175-25 x -873089-35 x -623635-37 x -589925-175 x -124727-185 x -117985-259 x -84275-925 x -23597-1295 x -16855-3371 x -6475
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 21,827,225, 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 | 21,827,225 | |
| -1 | -21,827,225 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,827,225.
Example:
1 x 21,827,225 = 21,827,225
and
-1 x -21,827,225 = 21,827,225
Notice both answers equal 21,827,225
With that explanation out of the way, let's continue. Next, we take the number 21,827,225 and divide it by 2:
21,827,225 ÷ 2 = 10,913,612.5
If the quotient is a whole number, then 2 and 10,913,612.5 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 | 21,827,225 | |
| -1 | -21,827,225 |
Now, we try dividing 21,827,225 by 3:
21,827,225 ÷ 3 = 7,275,741.6667
If the quotient is a whole number, then 3 and 7,275,741.6667 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 | 21,827,225 | |
| -1 | -21,827,225 |
Let's try dividing by 4:
21,827,225 ÷ 4 = 5,456,806.25
If the quotient is a whole number, then 4 and 5,456,806.25 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 | 21,827,225 | |
| -1 | 21,827,225 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 25 | 35 | 37 | 175 | 185 | 259 | 925 | 1,295 | 3,371 | 6,475 | 16,855 | 23,597 | 84,275 | 117,985 | 124,727 | 589,925 | 623,635 | 873,089 | 3,118,175 | 4,365,445 | 21,827,225 |
| -1 | -5 | -7 | -25 | -35 | -37 | -175 | -185 | -259 | -925 | -1,295 | -3,371 | -6,475 | -16,855 | -23,597 | -84,275 | -117,985 | -124,727 | -589,925 | -623,635 | -873,089 | -3,118,175 | -4,365,445 | -21,827,225 |
Here are some more numbers to try:
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