A:
Positive:
1 x 4235742117 x 249161323 x 1841627127 x 333523391 x 108331853 x 496572159 x 196192921 x 14501
Negative:
-1 x -42357421-17 x -2491613-23 x -1841627-127 x -333523-391 x -108331-853 x -49657-2159 x -19619-2921 x -14501
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 42,357,421, 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 | 42,357,421 | |
| -1 | -42,357,421 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 42,357,421.
Example:
1 x 42,357,421 = 42,357,421
and
-1 x -42,357,421 = 42,357,421
Notice both answers equal 42,357,421
With that explanation out of the way, let's continue. Next, we take the number 42,357,421 and divide it by 2:
42,357,421 ÷ 2 = 21,178,710.5
If the quotient is a whole number, then 2 and 21,178,710.5 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 | 42,357,421 | |
| -1 | -42,357,421 |
Now, we try dividing 42,357,421 by 3:
42,357,421 ÷ 3 = 14,119,140.3333
If the quotient is a whole number, then 3 and 14,119,140.3333 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 | 42,357,421 | |
| -1 | -42,357,421 |
Let's try dividing by 4:
42,357,421 ÷ 4 = 10,589,355.25
If the quotient is a whole number, then 4 and 10,589,355.25 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 | 42,357,421 | |
| -1 | 42,357,421 |
If you did it right, you will end up with this table:
| 1 | 17 | 23 | 127 | 391 | 853 | 2,159 | 2,921 | 14,501 | 19,619 | 49,657 | 108,331 | 333,523 | 1,841,627 | 2,491,613 | 42,357,421 |
| -1 | -17 | -23 | -127 | -391 | -853 | -2,159 | -2,921 | -14,501 | -19,619 | -49,657 | -108,331 | -333,523 | -1,841,627 | -2,491,613 | -42,357,421 |
Here are some more numbers to try:
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