A:
Positive:
1 x 387500055 x 77500017 x 553571535 x 1107143683 x 567351621 x 239053415 x 113474781 x 8105
Negative:
-1 x -38750005-5 x -7750001-7 x -5535715-35 x -1107143-683 x -56735-1621 x -23905-3415 x -11347-4781 x -8105
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 38,750,005, 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 | 38,750,005 | |
| -1 | -38,750,005 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 38,750,005.
Example:
1 x 38,750,005 = 38,750,005
and
-1 x -38,750,005 = 38,750,005
Notice both answers equal 38,750,005
With that explanation out of the way, let's continue. Next, we take the number 38,750,005 and divide it by 2:
38,750,005 ÷ 2 = 19,375,002.5
If the quotient is a whole number, then 2 and 19,375,002.5 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 | 38,750,005 | |
| -1 | -38,750,005 |
Now, we try dividing 38,750,005 by 3:
38,750,005 ÷ 3 = 12,916,668.3333
If the quotient is a whole number, then 3 and 12,916,668.3333 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 | 38,750,005 | |
| -1 | -38,750,005 |
Let's try dividing by 4:
38,750,005 ÷ 4 = 9,687,501.25
If the quotient is a whole number, then 4 and 9,687,501.25 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 | 38,750,005 | |
| -1 | 38,750,005 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 683 | 1,621 | 3,415 | 4,781 | 8,105 | 11,347 | 23,905 | 56,735 | 1,107,143 | 5,535,715 | 7,750,001 | 38,750,005 |
| -1 | -5 | -7 | -35 | -683 | -1,621 | -3,415 | -4,781 | -8,105 | -11,347 | -23,905 | -56,735 | -1,107,143 | -5,535,715 | -7,750,001 | -38,750,005 |
Here are some more numbers to try:
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