A:
Positive:
1 x 128643977 x 183777113 x 98956991 x 141367373 x 34489379 x 339432611 x 49272653 x 4849
Negative:
-1 x -12864397-7 x -1837771-13 x -989569-91 x -141367-373 x -34489-379 x -33943-2611 x -4927-2653 x -4849
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 12,864,397, 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 | 12,864,397 | |
| -1 | -12,864,397 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 12,864,397.
Example:
1 x 12,864,397 = 12,864,397
and
-1 x -12,864,397 = 12,864,397
Notice both answers equal 12,864,397
With that explanation out of the way, let's continue. Next, we take the number 12,864,397 and divide it by 2:
12,864,397 ÷ 2 = 6,432,198.5
If the quotient is a whole number, then 2 and 6,432,198.5 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 | 12,864,397 | |
| -1 | -12,864,397 |
Now, we try dividing 12,864,397 by 3:
12,864,397 ÷ 3 = 4,288,132.3333
If the quotient is a whole number, then 3 and 4,288,132.3333 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 | 12,864,397 | |
| -1 | -12,864,397 |
Let's try dividing by 4:
12,864,397 ÷ 4 = 3,216,099.25
If the quotient is a whole number, then 4 and 3,216,099.25 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 | 12,864,397 | |
| -1 | 12,864,397 |
If you did it right, you will end up with this table:
| 1 | 7 | 13 | 91 | 373 | 379 | 2,611 | 2,653 | 4,849 | 4,927 | 33,943 | 34,489 | 141,367 | 989,569 | 1,837,771 | 12,864,397 |
| -1 | -7 | -13 | -91 | -373 | -379 | -2,611 | -2,653 | -4,849 | -4,927 | -33,943 | -34,489 | -141,367 | -989,569 | -1,837,771 | -12,864,397 |
Here are some more numbers to try:
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