A:
Positive:
1 x 2171011711 x 197364713 x 1670009143 x 151819157 x 138281967 x 224511727 x 125712041 x 10637
Negative:
-1 x -21710117-11 x -1973647-13 x -1670009-143 x -151819-157 x -138281-967 x -22451-1727 x -12571-2041 x -10637
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 21,710,117, 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 | 21,710,117 | |
| -1 | -21,710,117 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,710,117.
Example:
1 x 21,710,117 = 21,710,117
and
-1 x -21,710,117 = 21,710,117
Notice both answers equal 21,710,117
With that explanation out of the way, let's continue. Next, we take the number 21,710,117 and divide it by 2:
21,710,117 ÷ 2 = 10,855,058.5
If the quotient is a whole number, then 2 and 10,855,058.5 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 | 21,710,117 | |
| -1 | -21,710,117 |
Now, we try dividing 21,710,117 by 3:
21,710,117 ÷ 3 = 7,236,705.6667
If the quotient is a whole number, then 3 and 7,236,705.6667 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 | 21,710,117 | |
| -1 | -21,710,117 |
Let's try dividing by 4:
21,710,117 ÷ 4 = 5,427,529.25
If the quotient is a whole number, then 4 and 5,427,529.25 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 | 21,710,117 | |
| -1 | 21,710,117 |
If you did it right, you will end up with this table:
| 1 | 11 | 13 | 143 | 157 | 967 | 1,727 | 2,041 | 10,637 | 12,571 | 22,451 | 138,281 | 151,819 | 1,670,009 | 1,973,647 | 21,710,117 |
| -1 | -11 | -13 | -143 | -157 | -967 | -1,727 | -2,041 | -10,637 | -12,571 | -22,451 | -138,281 | -151,819 | -1,670,009 | -1,973,647 | -21,710,117 |
Here are some more numbers to try:
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