A:
Positive:
1 x 387052617 x 552932319 x 2037119133 x 291017233 x 1661171249 x 309891631 x 237314427 x 8743
Negative:
-1 x -38705261-7 x -5529323-19 x -2037119-133 x -291017-233 x -166117-1249 x -30989-1631 x -23731-4427 x -8743
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 38,705,261, 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 | 38,705,261 | |
| -1 | -38,705,261 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 38,705,261.
Example:
1 x 38,705,261 = 38,705,261
and
-1 x -38,705,261 = 38,705,261
Notice both answers equal 38,705,261
With that explanation out of the way, let's continue. Next, we take the number 38,705,261 and divide it by 2:
38,705,261 ÷ 2 = 19,352,630.5
If the quotient is a whole number, then 2 and 19,352,630.5 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 | 38,705,261 | |
| -1 | -38,705,261 |
Now, we try dividing 38,705,261 by 3:
38,705,261 ÷ 3 = 12,901,753.6667
If the quotient is a whole number, then 3 and 12,901,753.6667 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 | 38,705,261 | |
| -1 | -38,705,261 |
Let's try dividing by 4:
38,705,261 ÷ 4 = 9,676,315.25
If the quotient is a whole number, then 4 and 9,676,315.25 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 | 38,705,261 | |
| -1 | 38,705,261 |
If you did it right, you will end up with this table:
| 1 | 7 | 19 | 133 | 233 | 1,249 | 1,631 | 4,427 | 8,743 | 23,731 | 30,989 | 166,117 | 291,017 | 2,037,119 | 5,529,323 | 38,705,261 |
| -1 | -7 | -19 | -133 | -233 | -1,249 | -1,631 | -4,427 | -8,743 | -23,731 | -30,989 | -166,117 | -291,017 | -2,037,119 | -5,529,323 | -38,705,261 |
Here are some more numbers to try:
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