A:
Positive:
1 x 157860717 x 225515367 x 23561397 x 162743347 x 45493469 x 33659679 x 232492429 x 6499
Negative:
-1 x -15786071-7 x -2255153-67 x -235613-97 x -162743-347 x -45493-469 x -33659-679 x -23249-2429 x -6499
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 15,786,071, 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 | 15,786,071 | |
| -1 | -15,786,071 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,786,071.
Example:
1 x 15,786,071 = 15,786,071
and
-1 x -15,786,071 = 15,786,071
Notice both answers equal 15,786,071
With that explanation out of the way, let's continue. Next, we take the number 15,786,071 and divide it by 2:
15,786,071 ÷ 2 = 7,893,035.5
If the quotient is a whole number, then 2 and 7,893,035.5 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 | 15,786,071 | |
| -1 | -15,786,071 |
Now, we try dividing 15,786,071 by 3:
15,786,071 ÷ 3 = 5,262,023.6667
If the quotient is a whole number, then 3 and 5,262,023.6667 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 | 15,786,071 | |
| -1 | -15,786,071 |
Let's try dividing by 4:
15,786,071 ÷ 4 = 3,946,517.75
If the quotient is a whole number, then 4 and 3,946,517.75 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 | 15,786,071 | |
| -1 | 15,786,071 |
If you did it right, you will end up with this table:
| 1 | 7 | 67 | 97 | 347 | 469 | 679 | 2,429 | 6,499 | 23,249 | 33,659 | 45,493 | 162,743 | 235,613 | 2,255,153 | 15,786,071 |
| -1 | -7 | -67 | -97 | -347 | -469 | -679 | -2,429 | -6,499 | -23,249 | -33,659 | -45,493 | -162,743 | -235,613 | -2,255,153 | -15,786,071 |
Here are some more numbers to try:
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