A:
Positive:
1 x 1240249719 x 65276323 x 539239101 x 122797281 x 44137437 x 283811919 x 64632323 x 5339
Negative:
-1 x -12402497-19 x -652763-23 x -539239-101 x -122797-281 x -44137-437 x -28381-1919 x -6463-2323 x -5339
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 12,402,497, 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 | 12,402,497 | |
| -1 | -12,402,497 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 12,402,497.
Example:
1 x 12,402,497 = 12,402,497
and
-1 x -12,402,497 = 12,402,497
Notice both answers equal 12,402,497
With that explanation out of the way, let's continue. Next, we take the number 12,402,497 and divide it by 2:
12,402,497 ÷ 2 = 6,201,248.5
If the quotient is a whole number, then 2 and 6,201,248.5 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 | 12,402,497 | |
| -1 | -12,402,497 |
Now, we try dividing 12,402,497 by 3:
12,402,497 ÷ 3 = 4,134,165.6667
If the quotient is a whole number, then 3 and 4,134,165.6667 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 | 12,402,497 | |
| -1 | -12,402,497 |
Let's try dividing by 4:
12,402,497 ÷ 4 = 3,100,624.25
If the quotient is a whole number, then 4 and 3,100,624.25 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 | 12,402,497 | |
| -1 | 12,402,497 |
If you did it right, you will end up with this table:
| 1 | 19 | 23 | 101 | 281 | 437 | 1,919 | 2,323 | 5,339 | 6,463 | 28,381 | 44,137 | 122,797 | 539,239 | 652,763 | 12,402,497 |
| -1 | -19 | -23 | -101 | -281 | -437 | -1,919 | -2,323 | -5,339 | -6,463 | -28,381 | -44,137 | -122,797 | -539,239 | -652,763 | -12,402,497 |
Here are some more numbers to try:
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