A:
Positive:
1 x 687105655 x 137421137 x 981579511 x 624641535 x 196315955 x 124928377 x 892345385 x 178469
Negative:
-1 x -68710565-5 x -13742113-7 x -9815795-11 x -6246415-35 x -1963159-55 x -1249283-77 x -892345-385 x -178469
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 68,710,565, 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 | 68,710,565 | |
| -1 | -68,710,565 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 68,710,565.
Example:
1 x 68,710,565 = 68,710,565
and
-1 x -68,710,565 = 68,710,565
Notice both answers equal 68,710,565
With that explanation out of the way, let's continue. Next, we take the number 68,710,565 and divide it by 2:
68,710,565 ÷ 2 = 34,355,282.5
If the quotient is a whole number, then 2 and 34,355,282.5 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 | 68,710,565 | |
| -1 | -68,710,565 |
Now, we try dividing 68,710,565 by 3:
68,710,565 ÷ 3 = 22,903,521.6667
If the quotient is a whole number, then 3 and 22,903,521.6667 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 | 68,710,565 | |
| -1 | -68,710,565 |
Let's try dividing by 4:
68,710,565 ÷ 4 = 17,177,641.25
If the quotient is a whole number, then 4 and 17,177,641.25 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 | 68,710,565 | |
| -1 | 68,710,565 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 11 | 35 | 55 | 77 | 385 | 178,469 | 892,345 | 1,249,283 | 1,963,159 | 6,246,415 | 9,815,795 | 13,742,113 | 68,710,565 |
| -1 | -5 | -7 | -11 | -35 | -55 | -77 | -385 | -178,469 | -892,345 | -1,249,283 | -1,963,159 | -6,246,415 | -9,815,795 | -13,742,113 | -68,710,565 |
Here are some more numbers to try:
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