A:
Positive:
1 x 1223571555 x 2447143131 x 394700561 x 2005855155 x 789401305 x 4011711891 x 647059455 x 12941
Negative:
-1 x -122357155-5 x -24471431-31 x -3947005-61 x -2005855-155 x -789401-305 x -401171-1891 x -64705-9455 x -12941
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 122,357,155, 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 | 122,357,155 | |
| -1 | -122,357,155 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 122,357,155.
Example:
1 x 122,357,155 = 122,357,155
and
-1 x -122,357,155 = 122,357,155
Notice both answers equal 122,357,155
With that explanation out of the way, let's continue. Next, we take the number 122,357,155 and divide it by 2:
122,357,155 ÷ 2 = 61,178,577.5
If the quotient is a whole number, then 2 and 61,178,577.5 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 | 122,357,155 | |
| -1 | -122,357,155 |
Now, we try dividing 122,357,155 by 3:
122,357,155 ÷ 3 = 40,785,718.3333
If the quotient is a whole number, then 3 and 40,785,718.3333 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 | 122,357,155 | |
| -1 | -122,357,155 |
Let's try dividing by 4:
122,357,155 ÷ 4 = 30,589,288.75
If the quotient is a whole number, then 4 and 30,589,288.75 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 | 122,357,155 | |
| -1 | 122,357,155 |
If you did it right, you will end up with this table:
| 1 | 5 | 31 | 61 | 155 | 305 | 1,891 | 9,455 | 12,941 | 64,705 | 401,171 | 789,401 | 2,005,855 | 3,947,005 | 24,471,431 | 122,357,155 |
| -1 | -5 | -31 | -61 | -155 | -305 | -1,891 | -9,455 | -12,941 | -64,705 | -401,171 | -789,401 | -2,005,855 | -3,947,005 | -24,471,431 | -122,357,155 |
Here are some more numbers to try:
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