A:
Positive:
1 x 420201537 x 600287919 x 2211587133 x 315941193 x 2177211351 x 311031637 x 256693667 x 11459
Negative:
-1 x -42020153-7 x -6002879-19 x -2211587-133 x -315941-193 x -217721-1351 x -31103-1637 x -25669-3667 x -11459
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 42,020,153, 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 | 42,020,153 | |
| -1 | -42,020,153 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 42,020,153.
Example:
1 x 42,020,153 = 42,020,153
and
-1 x -42,020,153 = 42,020,153
Notice both answers equal 42,020,153
With that explanation out of the way, let's continue. Next, we take the number 42,020,153 and divide it by 2:
42,020,153 ÷ 2 = 21,010,076.5
If the quotient is a whole number, then 2 and 21,010,076.5 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 | 42,020,153 | |
| -1 | -42,020,153 |
Now, we try dividing 42,020,153 by 3:
42,020,153 ÷ 3 = 14,006,717.6667
If the quotient is a whole number, then 3 and 14,006,717.6667 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 | 42,020,153 | |
| -1 | -42,020,153 |
Let's try dividing by 4:
42,020,153 ÷ 4 = 10,505,038.25
If the quotient is a whole number, then 4 and 10,505,038.25 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 | 42,020,153 | |
| -1 | 42,020,153 |
If you did it right, you will end up with this table:
| 1 | 7 | 19 | 133 | 193 | 1,351 | 1,637 | 3,667 | 11,459 | 25,669 | 31,103 | 217,721 | 315,941 | 2,211,587 | 6,002,879 | 42,020,153 |
| -1 | -7 | -19 | -133 | -193 | -1,351 | -1,637 | -3,667 | -11,459 | -25,669 | -31,103 | -217,721 | -315,941 | -2,211,587 | -6,002,879 | -42,020,153 |
Here are some more numbers to try:
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