A:
Positive:
1 x 2570209129 x 88627947 x 546853109 x 235799173 x 1485671363 x 188573161 x 81315017 x 5123
Negative:
-1 x -25702091-29 x -886279-47 x -546853-109 x -235799-173 x -148567-1363 x -18857-3161 x -8131-5017 x -5123
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 25,702,091, 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 | 25,702,091 | |
| -1 | -25,702,091 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 25,702,091.
Example:
1 x 25,702,091 = 25,702,091
and
-1 x -25,702,091 = 25,702,091
Notice both answers equal 25,702,091
With that explanation out of the way, let's continue. Next, we take the number 25,702,091 and divide it by 2:
25,702,091 ÷ 2 = 12,851,045.5
If the quotient is a whole number, then 2 and 12,851,045.5 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 | 25,702,091 | |
| -1 | -25,702,091 |
Now, we try dividing 25,702,091 by 3:
25,702,091 ÷ 3 = 8,567,363.6667
If the quotient is a whole number, then 3 and 8,567,363.6667 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 | 25,702,091 | |
| -1 | -25,702,091 |
Let's try dividing by 4:
25,702,091 ÷ 4 = 6,425,522.75
If the quotient is a whole number, then 4 and 6,425,522.75 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 | 25,702,091 | |
| -1 | 25,702,091 |
If you did it right, you will end up with this table:
| 1 | 29 | 47 | 109 | 173 | 1,363 | 3,161 | 5,017 | 5,123 | 8,131 | 18,857 | 148,567 | 235,799 | 546,853 | 886,279 | 25,702,091 |
| -1 | -29 | -47 | -109 | -173 | -1,363 | -3,161 | -5,017 | -5,123 | -8,131 | -18,857 | -148,567 | -235,799 | -546,853 | -886,279 | -25,702,091 |
Here are some more numbers to try:
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