A:
Positive:
1 x 1208446855 x 2416893713 x 929574559 x 204821565 x 1859149295 x 409643767 x 1575553835 x 31511
Negative:
-1 x -120844685-5 x -24168937-13 x -9295745-59 x -2048215-65 x -1859149-295 x -409643-767 x -157555-3835 x -31511
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 120,844,685, 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 | 120,844,685 | |
| -1 | -120,844,685 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 120,844,685.
Example:
1 x 120,844,685 = 120,844,685
and
-1 x -120,844,685 = 120,844,685
Notice both answers equal 120,844,685
With that explanation out of the way, let's continue. Next, we take the number 120,844,685 and divide it by 2:
120,844,685 ÷ 2 = 60,422,342.5
If the quotient is a whole number, then 2 and 60,422,342.5 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 | 120,844,685 | |
| -1 | -120,844,685 |
Now, we try dividing 120,844,685 by 3:
120,844,685 ÷ 3 = 40,281,561.6667
If the quotient is a whole number, then 3 and 40,281,561.6667 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 | 120,844,685 | |
| -1 | -120,844,685 |
Let's try dividing by 4:
120,844,685 ÷ 4 = 30,211,171.25
If the quotient is a whole number, then 4 and 30,211,171.25 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 | 120,844,685 | |
| -1 | 120,844,685 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 59 | 65 | 295 | 767 | 3,835 | 31,511 | 157,555 | 409,643 | 1,859,149 | 2,048,215 | 9,295,745 | 24,168,937 | 120,844,685 |
| -1 | -5 | -13 | -59 | -65 | -295 | -767 | -3,835 | -31,511 | -157,555 | -409,643 | -1,859,149 | -2,048,215 | -9,295,745 | -24,168,937 | -120,844,685 |
Here are some more numbers to try:
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