A:
Positive:
1 x 281037055 x 56207417 x 401481535 x 80296349 x 573545245 x 114709343 x 819351715 x 163872341 x 120052401 x 11705
Negative:
-1 x -28103705-5 x -5620741-7 x -4014815-35 x -802963-49 x -573545-245 x -114709-343 x -81935-1715 x -16387-2341 x -12005-2401 x -11705
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 28,103,705, 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 | 28,103,705 | |
| -1 | -28,103,705 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 28,103,705.
Example:
1 x 28,103,705 = 28,103,705
and
-1 x -28,103,705 = 28,103,705
Notice both answers equal 28,103,705
With that explanation out of the way, let's continue. Next, we take the number 28,103,705 and divide it by 2:
28,103,705 ÷ 2 = 14,051,852.5
If the quotient is a whole number, then 2 and 14,051,852.5 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 | 28,103,705 | |
| -1 | -28,103,705 |
Now, we try dividing 28,103,705 by 3:
28,103,705 ÷ 3 = 9,367,901.6667
If the quotient is a whole number, then 3 and 9,367,901.6667 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 | 28,103,705 | |
| -1 | -28,103,705 |
Let's try dividing by 4:
28,103,705 ÷ 4 = 7,025,926.25
If the quotient is a whole number, then 4 and 7,025,926.25 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 | 28,103,705 | |
| -1 | 28,103,705 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 49 | 245 | 343 | 1,715 | 2,341 | 2,401 | 11,705 | 12,005 | 16,387 | 81,935 | 114,709 | 573,545 | 802,963 | 4,014,815 | 5,620,741 | 28,103,705 |
| -1 | -5 | -7 | -35 | -49 | -245 | -343 | -1,715 | -2,341 | -2,401 | -11,705 | -12,005 | -16,387 | -81,935 | -114,709 | -573,545 | -802,963 | -4,014,815 | -5,620,741 | -28,103,705 |
Here are some more numbers to try:
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