A:
Positive:
1 x 197251755 x 394503525 x 78900743 x 45872559 x 334325215 x 91745295 x 66865311 x 634251075 x 183491475 x 133731555 x 126852537 x 7775
Negative:
-1 x -19725175-5 x -3945035-25 x -789007-43 x -458725-59 x -334325-215 x -91745-295 x -66865-311 x -63425-1075 x -18349-1475 x -13373-1555 x -12685-2537 x -7775
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 19,725,175, 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 | 19,725,175 | |
| -1 | -19,725,175 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 19,725,175.
Example:
1 x 19,725,175 = 19,725,175
and
-1 x -19,725,175 = 19,725,175
Notice both answers equal 19,725,175
With that explanation out of the way, let's continue. Next, we take the number 19,725,175 and divide it by 2:
19,725,175 ÷ 2 = 9,862,587.5
If the quotient is a whole number, then 2 and 9,862,587.5 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 | 19,725,175 | |
| -1 | -19,725,175 |
Now, we try dividing 19,725,175 by 3:
19,725,175 ÷ 3 = 6,575,058.3333
If the quotient is a whole number, then 3 and 6,575,058.3333 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 | 19,725,175 | |
| -1 | -19,725,175 |
Let's try dividing by 4:
19,725,175 ÷ 4 = 4,931,293.75
If the quotient is a whole number, then 4 and 4,931,293.75 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 | 19,725,175 | |
| -1 | 19,725,175 |
If you did it right, you will end up with this table:
| 1 | 5 | 25 | 43 | 59 | 215 | 295 | 311 | 1,075 | 1,475 | 1,555 | 2,537 | 7,775 | 12,685 | 13,373 | 18,349 | 63,425 | 66,865 | 91,745 | 334,325 | 458,725 | 789,007 | 3,945,035 | 19,725,175 |
| -1 | -5 | -25 | -43 | -59 | -215 | -295 | -311 | -1,075 | -1,475 | -1,555 | -2,537 | -7,775 | -12,685 | -13,373 | -18,349 | -63,425 | -66,865 | -91,745 | -334,325 | -458,725 | -789,007 | -3,945,035 | -19,725,175 |
Here are some more numbers to try:
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