A:
Positive:
1 x 2112605313 x 162508117 x 1242709109 x 193817221 x 95593877 x 240891417 x 149091853 x 11401
Negative:
-1 x -21126053-13 x -1625081-17 x -1242709-109 x -193817-221 x -95593-877 x -24089-1417 x -14909-1853 x -11401
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 21,126,053, 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 | 21,126,053 | |
| -1 | -21,126,053 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,126,053.
Example:
1 x 21,126,053 = 21,126,053
and
-1 x -21,126,053 = 21,126,053
Notice both answers equal 21,126,053
With that explanation out of the way, let's continue. Next, we take the number 21,126,053 and divide it by 2:
21,126,053 ÷ 2 = 10,563,026.5
If the quotient is a whole number, then 2 and 10,563,026.5 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 | 21,126,053 | |
| -1 | -21,126,053 |
Now, we try dividing 21,126,053 by 3:
21,126,053 ÷ 3 = 7,042,017.6667
If the quotient is a whole number, then 3 and 7,042,017.6667 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 | 21,126,053 | |
| -1 | -21,126,053 |
Let's try dividing by 4:
21,126,053 ÷ 4 = 5,281,513.25
If the quotient is a whole number, then 4 and 5,281,513.25 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 | 21,126,053 | |
| -1 | 21,126,053 |
If you did it right, you will end up with this table:
| 1 | 13 | 17 | 109 | 221 | 877 | 1,417 | 1,853 | 11,401 | 14,909 | 24,089 | 95,593 | 193,817 | 1,242,709 | 1,625,081 | 21,126,053 |
| -1 | -13 | -17 | -109 | -221 | -877 | -1,417 | -1,853 | -11,401 | -14,909 | -24,089 | -95,593 | -193,817 | -1,242,709 | -1,625,081 | -21,126,053 |
Here are some more numbers to try:
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