A:
Positive:
1 x 153199977 x 218857111 x 139272743 x 35627949 x 31265377 x 198961301 x 50897473 x 32389539 x 28423661 x 231772107 x 72713311 x 4627
Negative:
-1 x -15319997-7 x -2188571-11 x -1392727-43 x -356279-49 x -312653-77 x -198961-301 x -50897-473 x -32389-539 x -28423-661 x -23177-2107 x -7271-3311 x -4627
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 15,319,997, 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 | 15,319,997 | |
| -1 | -15,319,997 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,319,997.
Example:
1 x 15,319,997 = 15,319,997
and
-1 x -15,319,997 = 15,319,997
Notice both answers equal 15,319,997
With that explanation out of the way, let's continue. Next, we take the number 15,319,997 and divide it by 2:
15,319,997 ÷ 2 = 7,659,998.5
If the quotient is a whole number, then 2 and 7,659,998.5 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 | 15,319,997 | |
| -1 | -15,319,997 |
Now, we try dividing 15,319,997 by 3:
15,319,997 ÷ 3 = 5,106,665.6667
If the quotient is a whole number, then 3 and 5,106,665.6667 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 | 15,319,997 | |
| -1 | -15,319,997 |
Let's try dividing by 4:
15,319,997 ÷ 4 = 3,829,999.25
If the quotient is a whole number, then 4 and 3,829,999.25 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 | 15,319,997 | |
| -1 | 15,319,997 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 43 | 49 | 77 | 301 | 473 | 539 | 661 | 2,107 | 3,311 | 4,627 | 7,271 | 23,177 | 28,423 | 32,389 | 50,897 | 198,961 | 312,653 | 356,279 | 1,392,727 | 2,188,571 | 15,319,997 |
| -1 | -7 | -11 | -43 | -49 | -77 | -301 | -473 | -539 | -661 | -2,107 | -3,311 | -4,627 | -7,271 | -23,177 | -28,423 | -32,389 | -50,897 | -198,961 | -312,653 | -356,279 | -1,392,727 | -2,188,571 | -15,319,997 |
Here are some more numbers to try:
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