A:
Positive:
1 x 1039899855 x 2079799711 x 945363555 x 1890727587 x 1771552935 x 354313221 x 322856457 x 16105
Negative:
-1 x -103989985-5 x -20797997-11 x -9453635-55 x -1890727-587 x -177155-2935 x -35431-3221 x -32285-6457 x -16105
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 103,989,985, 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 | 103,989,985 | |
| -1 | -103,989,985 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 103,989,985.
Example:
1 x 103,989,985 = 103,989,985
and
-1 x -103,989,985 = 103,989,985
Notice both answers equal 103,989,985
With that explanation out of the way, let's continue. Next, we take the number 103,989,985 and divide it by 2:
103,989,985 ÷ 2 = 51,994,992.5
If the quotient is a whole number, then 2 and 51,994,992.5 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 | 103,989,985 | |
| -1 | -103,989,985 |
Now, we try dividing 103,989,985 by 3:
103,989,985 ÷ 3 = 34,663,328.3333
If the quotient is a whole number, then 3 and 34,663,328.3333 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 | 103,989,985 | |
| -1 | -103,989,985 |
Let's try dividing by 4:
103,989,985 ÷ 4 = 25,997,496.25
If the quotient is a whole number, then 4 and 25,997,496.25 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 | 103,989,985 | |
| -1 | 103,989,985 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 587 | 2,935 | 3,221 | 6,457 | 16,105 | 32,285 | 35,431 | 177,155 | 1,890,727 | 9,453,635 | 20,797,997 | 103,989,985 |
| -1 | -5 | -11 | -55 | -587 | -2,935 | -3,221 | -6,457 | -16,105 | -32,285 | -35,431 | -177,155 | -1,890,727 | -9,453,635 | -20,797,997 | -103,989,985 |
Here are some more numbers to try:
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