A:
Positive:
1 x 687908355 x 1375816771 x 968885107 x 642905355 x 193777535 x 1285811811 x 379857597 x 9055
Negative:
-1 x -68790835-5 x -13758167-71 x -968885-107 x -642905-355 x -193777-535 x -128581-1811 x -37985-7597 x -9055
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 68,790,835, 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 | 68,790,835 | |
| -1 | -68,790,835 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 68,790,835.
Example:
1 x 68,790,835 = 68,790,835
and
-1 x -68,790,835 = 68,790,835
Notice both answers equal 68,790,835
With that explanation out of the way, let's continue. Next, we take the number 68,790,835 and divide it by 2:
68,790,835 ÷ 2 = 34,395,417.5
If the quotient is a whole number, then 2 and 34,395,417.5 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 | 68,790,835 | |
| -1 | -68,790,835 |
Now, we try dividing 68,790,835 by 3:
68,790,835 ÷ 3 = 22,930,278.3333
If the quotient is a whole number, then 3 and 22,930,278.3333 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 | 68,790,835 | |
| -1 | -68,790,835 |
Let's try dividing by 4:
68,790,835 ÷ 4 = 17,197,708.75
If the quotient is a whole number, then 4 and 17,197,708.75 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 | 68,790,835 | |
| -1 | 68,790,835 |
If you did it right, you will end up with this table:
| 1 | 5 | 71 | 107 | 355 | 535 | 1,811 | 7,597 | 9,055 | 37,985 | 128,581 | 193,777 | 642,905 | 968,885 | 13,758,167 | 68,790,835 |
| -1 | -5 | -71 | -107 | -355 | -535 | -1,811 | -7,597 | -9,055 | -37,985 | -128,581 | -193,777 | -642,905 | -968,885 | -13,758,167 | -68,790,835 |
Here are some more numbers to try:
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