A:
Positive:
1 x 681381477 x 973402111 x 619437777 x 884911149 x 4573031043 x 653291639 x 415735939 x 11473
Negative:
-1 x -68138147-7 x -9734021-11 x -6194377-77 x -884911-149 x -457303-1043 x -65329-1639 x -41573-5939 x -11473
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 68,138,147, 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 | 68,138,147 | |
| -1 | -68,138,147 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 68,138,147.
Example:
1 x 68,138,147 = 68,138,147
and
-1 x -68,138,147 = 68,138,147
Notice both answers equal 68,138,147
With that explanation out of the way, let's continue. Next, we take the number 68,138,147 and divide it by 2:
68,138,147 ÷ 2 = 34,069,073.5
If the quotient is a whole number, then 2 and 34,069,073.5 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 | 68,138,147 | |
| -1 | -68,138,147 |
Now, we try dividing 68,138,147 by 3:
68,138,147 ÷ 3 = 22,712,715.6667
If the quotient is a whole number, then 3 and 22,712,715.6667 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 | 68,138,147 | |
| -1 | -68,138,147 |
Let's try dividing by 4:
68,138,147 ÷ 4 = 17,034,536.75
If the quotient is a whole number, then 4 and 17,034,536.75 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 | 68,138,147 | |
| -1 | 68,138,147 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 77 | 149 | 1,043 | 1,639 | 5,939 | 11,473 | 41,573 | 65,329 | 457,303 | 884,911 | 6,194,377 | 9,734,021 | 68,138,147 |
| -1 | -7 | -11 | -77 | -149 | -1,043 | -1,639 | -5,939 | -11,473 | -41,573 | -65,329 | -457,303 | -884,911 | -6,194,377 | -9,734,021 | -68,138,147 |
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