A:
Positive:
1 x 1722817855 x 3445635713 x 1325244565 x 26504891039 x 1658152551 x 675355195 x 3316312755 x 13507
Negative:
-1 x -172281785-5 x -34456357-13 x -13252445-65 x -2650489-1039 x -165815-2551 x -67535-5195 x -33163-12755 x -13507
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 172,281,785, 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 | 172,281,785 | |
| -1 | -172,281,785 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 172,281,785.
Example:
1 x 172,281,785 = 172,281,785
and
-1 x -172,281,785 = 172,281,785
Notice both answers equal 172,281,785
With that explanation out of the way, let's continue. Next, we take the number 172,281,785 and divide it by 2:
172,281,785 ÷ 2 = 86,140,892.5
If the quotient is a whole number, then 2 and 86,140,892.5 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 | 172,281,785 | |
| -1 | -172,281,785 |
Now, we try dividing 172,281,785 by 3:
172,281,785 ÷ 3 = 57,427,261.6667
If the quotient is a whole number, then 3 and 57,427,261.6667 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 | 172,281,785 | |
| -1 | -172,281,785 |
Let's try dividing by 4:
172,281,785 ÷ 4 = 43,070,446.25
If the quotient is a whole number, then 4 and 43,070,446.25 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 | 172,281,785 | |
| -1 | 172,281,785 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 65 | 1,039 | 2,551 | 5,195 | 12,755 | 13,507 | 33,163 | 67,535 | 165,815 | 2,650,489 | 13,252,445 | 34,456,357 | 172,281,785 |
| -1 | -5 | -13 | -65 | -1,039 | -2,551 | -5,195 | -12,755 | -13,507 | -33,163 | -67,535 | -165,815 | -2,650,489 | -13,252,445 | -34,456,357 | -172,281,785 |
Here are some more numbers to try:
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