A:
Positive:
1 x 1232203155 x 2464406323 x 5357405115 x 1071481661 x 1864151621 x 760153305 x 372838105 x 15203
Negative:
-1 x -123220315-5 x -24644063-23 x -5357405-115 x -1071481-661 x -186415-1621 x -76015-3305 x -37283-8105 x -15203
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 123,220,315, 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 | 123,220,315 | |
| -1 | -123,220,315 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 123,220,315.
Example:
1 x 123,220,315 = 123,220,315
and
-1 x -123,220,315 = 123,220,315
Notice both answers equal 123,220,315
With that explanation out of the way, let's continue. Next, we take the number 123,220,315 and divide it by 2:
123,220,315 ÷ 2 = 61,610,157.5
If the quotient is a whole number, then 2 and 61,610,157.5 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 | 123,220,315 | |
| -1 | -123,220,315 |
Now, we try dividing 123,220,315 by 3:
123,220,315 ÷ 3 = 41,073,438.3333
If the quotient is a whole number, then 3 and 41,073,438.3333 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 | 123,220,315 | |
| -1 | -123,220,315 |
Let's try dividing by 4:
123,220,315 ÷ 4 = 30,805,078.75
If the quotient is a whole number, then 4 and 30,805,078.75 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 | 123,220,315 | |
| -1 | 123,220,315 |
If you did it right, you will end up with this table:
| 1 | 5 | 23 | 115 | 661 | 1,621 | 3,305 | 8,105 | 15,203 | 37,283 | 76,015 | 186,415 | 1,071,481 | 5,357,405 | 24,644,063 | 123,220,315 |
| -1 | -5 | -23 | -115 | -661 | -1,621 | -3,305 | -8,105 | -15,203 | -37,283 | -76,015 | -186,415 | -1,071,481 | -5,357,405 | -24,644,063 | -123,220,315 |
Here are some more numbers to try:
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