A:
Positive:
1 x 214324397 x 306177731 x 691369217 x 98767283 x 75733349 x 614111981 x 108192443 x 8773
Negative:
-1 x -21432439-7 x -3061777-31 x -691369-217 x -98767-283 x -75733-349 x -61411-1981 x -10819-2443 x -8773
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 21,432,439, 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 | 21,432,439 | |
| -1 | -21,432,439 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,432,439.
Example:
1 x 21,432,439 = 21,432,439
and
-1 x -21,432,439 = 21,432,439
Notice both answers equal 21,432,439
With that explanation out of the way, let's continue. Next, we take the number 21,432,439 and divide it by 2:
21,432,439 ÷ 2 = 10,716,219.5
If the quotient is a whole number, then 2 and 10,716,219.5 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 | 21,432,439 | |
| -1 | -21,432,439 |
Now, we try dividing 21,432,439 by 3:
21,432,439 ÷ 3 = 7,144,146.3333
If the quotient is a whole number, then 3 and 7,144,146.3333 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 | 21,432,439 | |
| -1 | -21,432,439 |
Let's try dividing by 4:
21,432,439 ÷ 4 = 5,358,109.75
If the quotient is a whole number, then 4 and 5,358,109.75 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 | 21,432,439 | |
| -1 | 21,432,439 |
If you did it right, you will end up with this table:
| 1 | 7 | 31 | 217 | 283 | 349 | 1,981 | 2,443 | 8,773 | 10,819 | 61,411 | 75,733 | 98,767 | 691,369 | 3,061,777 | 21,432,439 |
| -1 | -7 | -31 | -217 | -283 | -349 | -1,981 | -2,443 | -8,773 | -10,819 | -61,411 | -75,733 | -98,767 | -691,369 | -3,061,777 | -21,432,439 |
Here are some more numbers to try:
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