A:
Positive:
1 x 205253517 x 293219311 x 186594177 x 266563121 x 169631847 x 242331331 x 154212203 x 9317
Negative:
-1 x -20525351-7 x -2932193-11 x -1865941-77 x -266563-121 x -169631-847 x -24233-1331 x -15421-2203 x -9317
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 20,525,351, 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 | 20,525,351 | |
| -1 | -20,525,351 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,525,351.
Example:
1 x 20,525,351 = 20,525,351
and
-1 x -20,525,351 = 20,525,351
Notice both answers equal 20,525,351
With that explanation out of the way, let's continue. Next, we take the number 20,525,351 and divide it by 2:
20,525,351 ÷ 2 = 10,262,675.5
If the quotient is a whole number, then 2 and 10,262,675.5 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 | 20,525,351 | |
| -1 | -20,525,351 |
Now, we try dividing 20,525,351 by 3:
20,525,351 ÷ 3 = 6,841,783.6667
If the quotient is a whole number, then 3 and 6,841,783.6667 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 | 20,525,351 | |
| -1 | -20,525,351 |
Let's try dividing by 4:
20,525,351 ÷ 4 = 5,131,337.75
If the quotient is a whole number, then 4 and 5,131,337.75 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 | 20,525,351 | |
| -1 | 20,525,351 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 77 | 121 | 847 | 1,331 | 2,203 | 9,317 | 15,421 | 24,233 | 169,631 | 266,563 | 1,865,941 | 2,932,193 | 20,525,351 |
| -1 | -7 | -11 | -77 | -121 | -847 | -1,331 | -2,203 | -9,317 | -15,421 | -24,233 | -169,631 | -266,563 | -1,865,941 | -2,932,193 | -20,525,351 |
Here are some more numbers to try:
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