A:
Positive:
1 x 685008177 x 978583111 x 622734777 x 889621131 x 522907917 x 747011441 x 475376791 x 10087
Negative:
-1 x -68500817-7 x -9785831-11 x -6227347-77 x -889621-131 x -522907-917 x -74701-1441 x -47537-6791 x -10087
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 68,500,817, 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 | 68,500,817 | |
| -1 | -68,500,817 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 68,500,817.
Example:
1 x 68,500,817 = 68,500,817
and
-1 x -68,500,817 = 68,500,817
Notice both answers equal 68,500,817
With that explanation out of the way, let's continue. Next, we take the number 68,500,817 and divide it by 2:
68,500,817 ÷ 2 = 34,250,408.5
If the quotient is a whole number, then 2 and 34,250,408.5 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 | 68,500,817 | |
| -1 | -68,500,817 |
Now, we try dividing 68,500,817 by 3:
68,500,817 ÷ 3 = 22,833,605.6667
If the quotient is a whole number, then 3 and 22,833,605.6667 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 | 68,500,817 | |
| -1 | -68,500,817 |
Let's try dividing by 4:
68,500,817 ÷ 4 = 17,125,204.25
If the quotient is a whole number, then 4 and 17,125,204.25 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 | 68,500,817 | |
| -1 | 68,500,817 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 77 | 131 | 917 | 1,441 | 6,791 | 10,087 | 47,537 | 74,701 | 522,907 | 889,621 | 6,227,347 | 9,785,831 | 68,500,817 |
| -1 | -7 | -11 | -77 | -131 | -917 | -1,441 | -6,791 | -10,087 | -47,537 | -74,701 | -522,907 | -889,621 | -6,227,347 | -9,785,831 | -68,500,817 |
Here are some more numbers to try:
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