A:
Positive:
1 x 1214512317 x 71441919 x 639217323 x 37601361 x 336431979 x 6137
Negative:
-1 x -12145123-17 x -714419-19 x -639217-323 x -37601-361 x -33643-1979 x -6137
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 12,145,123, 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 | 12,145,123 | |
| -1 | -12,145,123 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 12,145,123.
Example:
1 x 12,145,123 = 12,145,123
and
-1 x -12,145,123 = 12,145,123
Notice both answers equal 12,145,123
With that explanation out of the way, let's continue. Next, we take the number 12,145,123 and divide it by 2:
12,145,123 ÷ 2 = 6,072,561.5
If the quotient is a whole number, then 2 and 6,072,561.5 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 | 12,145,123 | |
| -1 | -12,145,123 |
Now, we try dividing 12,145,123 by 3:
12,145,123 ÷ 3 = 4,048,374.3333
If the quotient is a whole number, then 3 and 4,048,374.3333 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 | 12,145,123 | |
| -1 | -12,145,123 |
Let's try dividing by 4:
12,145,123 ÷ 4 = 3,036,280.75
If the quotient is a whole number, then 4 and 3,036,280.75 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 | 12,145,123 | |
| -1 | 12,145,123 |
If you did it right, you will end up with this table:
| 1 | 17 | 19 | 323 | 361 | 1,979 | 6,137 | 33,643 | 37,601 | 639,217 | 714,419 | 12,145,123 |
| -1 | -17 | -19 | -323 | -361 | -1,979 | -6,137 | -33,643 | -37,601 | -639,217 | -714,419 | -12,145,123 |
Here are some more numbers to try:
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