A:
Positive:
1 x 159383777 x 227691113 x 122602949 x 32527391 x 175147131 x 121667191 x 83447637 x 25021917 x 173811337 x 119211703 x 93592483 x 6419
Negative:
-1 x -15938377-7 x -2276911-13 x -1226029-49 x -325273-91 x -175147-131 x -121667-191 x -83447-637 x -25021-917 x -17381-1337 x -11921-1703 x -9359-2483 x -6419
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 15,938,377, 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 | 15,938,377 | |
| -1 | -15,938,377 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,938,377.
Example:
1 x 15,938,377 = 15,938,377
and
-1 x -15,938,377 = 15,938,377
Notice both answers equal 15,938,377
With that explanation out of the way, let's continue. Next, we take the number 15,938,377 and divide it by 2:
15,938,377 ÷ 2 = 7,969,188.5
If the quotient is a whole number, then 2 and 7,969,188.5 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 | 15,938,377 | |
| -1 | -15,938,377 |
Now, we try dividing 15,938,377 by 3:
15,938,377 ÷ 3 = 5,312,792.3333
If the quotient is a whole number, then 3 and 5,312,792.3333 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 | 15,938,377 | |
| -1 | -15,938,377 |
Let's try dividing by 4:
15,938,377 ÷ 4 = 3,984,594.25
If the quotient is a whole number, then 4 and 3,984,594.25 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 | 15,938,377 | |
| -1 | 15,938,377 |
If you did it right, you will end up with this table:
| 1 | 7 | 13 | 49 | 91 | 131 | 191 | 637 | 917 | 1,337 | 1,703 | 2,483 | 6,419 | 9,359 | 11,921 | 17,381 | 25,021 | 83,447 | 121,667 | 175,147 | 325,273 | 1,226,029 | 2,276,911 | 15,938,377 |
| -1 | -7 | -13 | -49 | -91 | -131 | -191 | -637 | -917 | -1,337 | -1,703 | -2,483 | -6,419 | -9,359 | -11,921 | -17,381 | -25,021 | -83,447 | -121,667 | -175,147 | -325,273 | -1,226,029 | -2,276,911 | -15,938,377 |
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