A:
Positive:
1 x 254305317 x 363293319 x 1338449133 x 191207367 x 69293521 x 488112569 x 98993647 x 6973
Negative:
-1 x -25430531-7 x -3632933-19 x -1338449-133 x -191207-367 x -69293-521 x -48811-2569 x -9899-3647 x -6973
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 25,430,531, 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 | 25,430,531 | |
| -1 | -25,430,531 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 25,430,531.
Example:
1 x 25,430,531 = 25,430,531
and
-1 x -25,430,531 = 25,430,531
Notice both answers equal 25,430,531
With that explanation out of the way, let's continue. Next, we take the number 25,430,531 and divide it by 2:
25,430,531 ÷ 2 = 12,715,265.5
If the quotient is a whole number, then 2 and 12,715,265.5 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 | 25,430,531 | |
| -1 | -25,430,531 |
Now, we try dividing 25,430,531 by 3:
25,430,531 ÷ 3 = 8,476,843.6667
If the quotient is a whole number, then 3 and 8,476,843.6667 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 | 25,430,531 | |
| -1 | -25,430,531 |
Let's try dividing by 4:
25,430,531 ÷ 4 = 6,357,632.75
If the quotient is a whole number, then 4 and 6,357,632.75 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 | 25,430,531 | |
| -1 | 25,430,531 |
If you did it right, you will end up with this table:
| 1 | 7 | 19 | 133 | 367 | 521 | 2,569 | 3,647 | 6,973 | 9,899 | 48,811 | 69,293 | 191,207 | 1,338,449 | 3,632,933 | 25,430,531 |
| -1 | -7 | -19 | -133 | -367 | -521 | -2,569 | -3,647 | -6,973 | -9,899 | -48,811 | -69,293 | -191,207 | -1,338,449 | -3,632,933 | -25,430,531 |
Here are some more numbers to try:
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