A:
Positive:
1 x 127624217 x 182320331 x 411691103 x 123907217 x 58813571 x 22351721 x 177013193 x 3997
Negative:
-1 x -12762421-7 x -1823203-31 x -411691-103 x -123907-217 x -58813-571 x -22351-721 x -17701-3193 x -3997
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 12,762,421, 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 | 12,762,421 | |
| -1 | -12,762,421 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 12,762,421.
Example:
1 x 12,762,421 = 12,762,421
and
-1 x -12,762,421 = 12,762,421
Notice both answers equal 12,762,421
With that explanation out of the way, let's continue. Next, we take the number 12,762,421 and divide it by 2:
12,762,421 ÷ 2 = 6,381,210.5
If the quotient is a whole number, then 2 and 6,381,210.5 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 | 12,762,421 | |
| -1 | -12,762,421 |
Now, we try dividing 12,762,421 by 3:
12,762,421 ÷ 3 = 4,254,140.3333
If the quotient is a whole number, then 3 and 4,254,140.3333 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 | 12,762,421 | |
| -1 | -12,762,421 |
Let's try dividing by 4:
12,762,421 ÷ 4 = 3,190,605.25
If the quotient is a whole number, then 4 and 3,190,605.25 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 | 12,762,421 | |
| -1 | 12,762,421 |
If you did it right, you will end up with this table:
| 1 | 7 | 31 | 103 | 217 | 571 | 721 | 3,193 | 3,997 | 17,701 | 22,351 | 58,813 | 123,907 | 411,691 | 1,823,203 | 12,762,421 |
| -1 | -7 | -31 | -103 | -217 | -571 | -721 | -3,193 | -3,997 | -17,701 | -22,351 | -58,813 | -123,907 | -411,691 | -1,823,203 | -12,762,421 |
Here are some more numbers to try:
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