A:
Positive:
1 x 158540697 x 226486711 x 144127977 x 205897103 x 153923721 x 219891133 x 139931999 x 7931
Negative:
-1 x -15854069-7 x -2264867-11 x -1441279-77 x -205897-103 x -153923-721 x -21989-1133 x -13993-1999 x -7931
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 15,854,069, 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 | 15,854,069 | |
| -1 | -15,854,069 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,854,069.
Example:
1 x 15,854,069 = 15,854,069
and
-1 x -15,854,069 = 15,854,069
Notice both answers equal 15,854,069
With that explanation out of the way, let's continue. Next, we take the number 15,854,069 and divide it by 2:
15,854,069 ÷ 2 = 7,927,034.5
If the quotient is a whole number, then 2 and 7,927,034.5 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 | 15,854,069 | |
| -1 | -15,854,069 |
Now, we try dividing 15,854,069 by 3:
15,854,069 ÷ 3 = 5,284,689.6667
If the quotient is a whole number, then 3 and 5,284,689.6667 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 | 15,854,069 | |
| -1 | -15,854,069 |
Let's try dividing by 4:
15,854,069 ÷ 4 = 3,963,517.25
If the quotient is a whole number, then 4 and 3,963,517.25 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 | 15,854,069 | |
| -1 | 15,854,069 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 77 | 103 | 721 | 1,133 | 1,999 | 7,931 | 13,993 | 21,989 | 153,923 | 205,897 | 1,441,279 | 2,264,867 | 15,854,069 |
| -1 | -7 | -11 | -77 | -103 | -721 | -1,133 | -1,999 | -7,931 | -13,993 | -21,989 | -153,923 | -205,897 | -1,441,279 | -2,264,867 | -15,854,069 |
Here are some more numbers to try:
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