A:
Positive:
1 x 686887255 x 137377457 x 981267525 x 274754935 x 196253583 x 827575175 x 392507415 x 165515581 x 1182252075 x 331032905 x 236454729 x 14525
Negative:
-1 x -68688725-5 x -13737745-7 x -9812675-25 x -2747549-35 x -1962535-83 x -827575-175 x -392507-415 x -165515-581 x -118225-2075 x -33103-2905 x -23645-4729 x -14525
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 68,688,725, 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 | 68,688,725 | |
| -1 | -68,688,725 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 68,688,725.
Example:
1 x 68,688,725 = 68,688,725
and
-1 x -68,688,725 = 68,688,725
Notice both answers equal 68,688,725
With that explanation out of the way, let's continue. Next, we take the number 68,688,725 and divide it by 2:
68,688,725 ÷ 2 = 34,344,362.5
If the quotient is a whole number, then 2 and 34,344,362.5 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 | 68,688,725 | |
| -1 | -68,688,725 |
Now, we try dividing 68,688,725 by 3:
68,688,725 ÷ 3 = 22,896,241.6667
If the quotient is a whole number, then 3 and 22,896,241.6667 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 | 68,688,725 | |
| -1 | -68,688,725 |
Let's try dividing by 4:
68,688,725 ÷ 4 = 17,172,181.25
If the quotient is a whole number, then 4 and 17,172,181.25 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 | 68,688,725 | |
| -1 | 68,688,725 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 25 | 35 | 83 | 175 | 415 | 581 | 2,075 | 2,905 | 4,729 | 14,525 | 23,645 | 33,103 | 118,225 | 165,515 | 392,507 | 827,575 | 1,962,535 | 2,747,549 | 9,812,675 | 13,737,745 | 68,688,725 |
| -1 | -5 | -7 | -25 | -35 | -83 | -175 | -415 | -581 | -2,075 | -2,905 | -4,729 | -14,525 | -23,645 | -33,103 | -118,225 | -165,515 | -392,507 | -827,575 | -1,962,535 | -2,747,549 | -9,812,675 | -13,737,745 | -68,688,725 |
Here are some more numbers to try:
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