A:
Positive:
1 x 2862097917 x 168358747 x 608957113 x 253283317 x 90287799 x 358211921 x 148995311 x 5389
Negative:
-1 x -28620979-17 x -1683587-47 x -608957-113 x -253283-317 x -90287-799 x -35821-1921 x -14899-5311 x -5389
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 28,620,979, 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 | 28,620,979 | |
| -1 | -28,620,979 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 28,620,979.
Example:
1 x 28,620,979 = 28,620,979
and
-1 x -28,620,979 = 28,620,979
Notice both answers equal 28,620,979
With that explanation out of the way, let's continue. Next, we take the number 28,620,979 and divide it by 2:
28,620,979 ÷ 2 = 14,310,489.5
If the quotient is a whole number, then 2 and 14,310,489.5 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 | 28,620,979 | |
| -1 | -28,620,979 |
Now, we try dividing 28,620,979 by 3:
28,620,979 ÷ 3 = 9,540,326.3333
If the quotient is a whole number, then 3 and 9,540,326.3333 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 | 28,620,979 | |
| -1 | -28,620,979 |
Let's try dividing by 4:
28,620,979 ÷ 4 = 7,155,244.75
If the quotient is a whole number, then 4 and 7,155,244.75 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 | 28,620,979 | |
| -1 | 28,620,979 |
If you did it right, you will end up with this table:
| 1 | 17 | 47 | 113 | 317 | 799 | 1,921 | 5,311 | 5,389 | 14,899 | 35,821 | 90,287 | 253,283 | 608,957 | 1,683,587 | 28,620,979 |
| -1 | -17 | -47 | -113 | -317 | -799 | -1,921 | -5,311 | -5,389 | -14,899 | -35,821 | -90,287 | -253,283 | -608,957 | -1,683,587 | -28,620,979 |
Here are some more numbers to try:
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