A:
Positive:
1 x 865782617 x 1236832311 x 787075137 x 233995377 x 1124393259 x 334279407 x 2127232849 x 30389
Negative:
-1 x -86578261-7 x -12368323-11 x -7870751-37 x -2339953-77 x -1124393-259 x -334279-407 x -212723-2849 x -30389
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 86,578,261, 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 | 86,578,261 | |
| -1 | -86,578,261 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 86,578,261.
Example:
1 x 86,578,261 = 86,578,261
and
-1 x -86,578,261 = 86,578,261
Notice both answers equal 86,578,261
With that explanation out of the way, let's continue. Next, we take the number 86,578,261 and divide it by 2:
86,578,261 ÷ 2 = 43,289,130.5
If the quotient is a whole number, then 2 and 43,289,130.5 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 | 86,578,261 | |
| -1 | -86,578,261 |
Now, we try dividing 86,578,261 by 3:
86,578,261 ÷ 3 = 28,859,420.3333
If the quotient is a whole number, then 3 and 28,859,420.3333 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 | 86,578,261 | |
| -1 | -86,578,261 |
Let's try dividing by 4:
86,578,261 ÷ 4 = 21,644,565.25
If the quotient is a whole number, then 4 and 21,644,565.25 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 | 86,578,261 | |
| -1 | 86,578,261 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 37 | 77 | 259 | 407 | 2,849 | 30,389 | 212,723 | 334,279 | 1,124,393 | 2,339,953 | 7,870,751 | 12,368,323 | 86,578,261 |
| -1 | -7 | -11 | -37 | -77 | -259 | -407 | -2,849 | -30,389 | -212,723 | -334,279 | -1,124,393 | -2,339,953 | -7,870,751 | -12,368,323 | -86,578,261 |
Here are some more numbers to try:
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