A:
Positive:
1 x 1565117155 x 3130234331 x 5048765155 x 1009753257 x 6089951285 x 1217993929 x 398357967 x 19645
Negative:
-1 x -156511715-5 x -31302343-31 x -5048765-155 x -1009753-257 x -608995-1285 x -121799-3929 x -39835-7967 x -19645
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 156,511,715, 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 | 156,511,715 | |
| -1 | -156,511,715 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 156,511,715.
Example:
1 x 156,511,715 = 156,511,715
and
-1 x -156,511,715 = 156,511,715
Notice both answers equal 156,511,715
With that explanation out of the way, let's continue. Next, we take the number 156,511,715 and divide it by 2:
156,511,715 ÷ 2 = 78,255,857.5
If the quotient is a whole number, then 2 and 78,255,857.5 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 | 156,511,715 | |
| -1 | -156,511,715 |
Now, we try dividing 156,511,715 by 3:
156,511,715 ÷ 3 = 52,170,571.6667
If the quotient is a whole number, then 3 and 52,170,571.6667 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 | 156,511,715 | |
| -1 | -156,511,715 |
Let's try dividing by 4:
156,511,715 ÷ 4 = 39,127,928.75
If the quotient is a whole number, then 4 and 39,127,928.75 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 | 156,511,715 | |
| -1 | 156,511,715 |
If you did it right, you will end up with this table:
| 1 | 5 | 31 | 155 | 257 | 1,285 | 3,929 | 7,967 | 19,645 | 39,835 | 121,799 | 608,995 | 1,009,753 | 5,048,765 | 31,302,343 | 156,511,715 |
| -1 | -5 | -31 | -155 | -257 | -1,285 | -3,929 | -7,967 | -19,645 | -39,835 | -121,799 | -608,995 | -1,009,753 | -5,048,765 | -31,302,343 | -156,511,715 |
Here are some more numbers to try:
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