A:
Positive:
1 x 2571019113 x 197770731 x 829361131 x 196261403 x 63797487 x 527931703 x 150974061 x 6331
Negative:
-1 x -25710191-13 x -1977707-31 x -829361-131 x -196261-403 x -63797-487 x -52793-1703 x -15097-4061 x -6331
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 25,710,191, 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 | 25,710,191 | |
| -1 | -25,710,191 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 25,710,191.
Example:
1 x 25,710,191 = 25,710,191
and
-1 x -25,710,191 = 25,710,191
Notice both answers equal 25,710,191
With that explanation out of the way, let's continue. Next, we take the number 25,710,191 and divide it by 2:
25,710,191 ÷ 2 = 12,855,095.5
If the quotient is a whole number, then 2 and 12,855,095.5 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 | 25,710,191 | |
| -1 | -25,710,191 |
Now, we try dividing 25,710,191 by 3:
25,710,191 ÷ 3 = 8,570,063.6667
If the quotient is a whole number, then 3 and 8,570,063.6667 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 | 25,710,191 | |
| -1 | -25,710,191 |
Let's try dividing by 4:
25,710,191 ÷ 4 = 6,427,547.75
If the quotient is a whole number, then 4 and 6,427,547.75 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 | 25,710,191 | |
| -1 | 25,710,191 |
If you did it right, you will end up with this table:
| 1 | 13 | 31 | 131 | 403 | 487 | 1,703 | 4,061 | 6,331 | 15,097 | 52,793 | 63,797 | 196,261 | 829,361 | 1,977,707 | 25,710,191 |
| -1 | -13 | -31 | -131 | -403 | -487 | -1,703 | -4,061 | -6,331 | -15,097 | -52,793 | -63,797 | -196,261 | -829,361 | -1,977,707 | -25,710,191 |
Here are some more numbers to try:
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