A:
Positive:
1 x 1237621455 x 2475242913 x 952016565 x 1904033797 x 1552852389 x 518053985 x 3105710361 x 11945
Negative:
-1 x -123762145-5 x -24752429-13 x -9520165-65 x -1904033-797 x -155285-2389 x -51805-3985 x -31057-10361 x -11945
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 123,762,145, 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 | 123,762,145 | |
| -1 | -123,762,145 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 123,762,145.
Example:
1 x 123,762,145 = 123,762,145
and
-1 x -123,762,145 = 123,762,145
Notice both answers equal 123,762,145
With that explanation out of the way, let's continue. Next, we take the number 123,762,145 and divide it by 2:
123,762,145 ÷ 2 = 61,881,072.5
If the quotient is a whole number, then 2 and 61,881,072.5 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 | 123,762,145 | |
| -1 | -123,762,145 |
Now, we try dividing 123,762,145 by 3:
123,762,145 ÷ 3 = 41,254,048.3333
If the quotient is a whole number, then 3 and 41,254,048.3333 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 | 123,762,145 | |
| -1 | -123,762,145 |
Let's try dividing by 4:
123,762,145 ÷ 4 = 30,940,536.25
If the quotient is a whole number, then 4 and 30,940,536.25 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 | 123,762,145 | |
| -1 | 123,762,145 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 65 | 797 | 2,389 | 3,985 | 10,361 | 11,945 | 31,057 | 51,805 | 155,285 | 1,904,033 | 9,520,165 | 24,752,429 | 123,762,145 |
| -1 | -5 | -13 | -65 | -797 | -2,389 | -3,985 | -10,361 | -11,945 | -31,057 | -51,805 | -155,285 | -1,904,033 | -9,520,165 | -24,752,429 | -123,762,145 |
Here are some more numbers to try:
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