A:
Positive:
1 x 1231542655 x 2463085313 x 947340565 x 1894681193 x 638105965 x 1276212509 x 490859817 x 12545
Negative:
-1 x -123154265-5 x -24630853-13 x -9473405-65 x -1894681-193 x -638105-965 x -127621-2509 x -49085-9817 x -12545
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 123,154,265, 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 | 123,154,265 | |
| -1 | -123,154,265 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 123,154,265.
Example:
1 x 123,154,265 = 123,154,265
and
-1 x -123,154,265 = 123,154,265
Notice both answers equal 123,154,265
With that explanation out of the way, let's continue. Next, we take the number 123,154,265 and divide it by 2:
123,154,265 ÷ 2 = 61,577,132.5
If the quotient is a whole number, then 2 and 61,577,132.5 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 | 123,154,265 | |
| -1 | -123,154,265 |
Now, we try dividing 123,154,265 by 3:
123,154,265 ÷ 3 = 41,051,421.6667
If the quotient is a whole number, then 3 and 41,051,421.6667 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 | 123,154,265 | |
| -1 | -123,154,265 |
Let's try dividing by 4:
123,154,265 ÷ 4 = 30,788,566.25
If the quotient is a whole number, then 4 and 30,788,566.25 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 | 123,154,265 | |
| -1 | 123,154,265 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 65 | 193 | 965 | 2,509 | 9,817 | 12,545 | 49,085 | 127,621 | 638,105 | 1,894,681 | 9,473,405 | 24,630,853 | 123,154,265 |
| -1 | -5 | -13 | -65 | -193 | -965 | -2,509 | -9,817 | -12,545 | -49,085 | -127,621 | -638,105 | -1,894,681 | -9,473,405 | -24,630,853 | -123,154,265 |
Here are some more numbers to try:
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