A:
Positive:
1 x 153616197 x 219451713 x 118166329 x 52971191 x 168809203 x 75673377 x 407472639 x 5821
Negative:
-1 x -15361619-7 x -2194517-13 x -1181663-29 x -529711-91 x -168809-203 x -75673-377 x -40747-2639 x -5821
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 15,361,619, 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 | 15,361,619 | |
| -1 | -15,361,619 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,361,619.
Example:
1 x 15,361,619 = 15,361,619
and
-1 x -15,361,619 = 15,361,619
Notice both answers equal 15,361,619
With that explanation out of the way, let's continue. Next, we take the number 15,361,619 and divide it by 2:
15,361,619 ÷ 2 = 7,680,809.5
If the quotient is a whole number, then 2 and 7,680,809.5 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 | 15,361,619 | |
| -1 | -15,361,619 |
Now, we try dividing 15,361,619 by 3:
15,361,619 ÷ 3 = 5,120,539.6667
If the quotient is a whole number, then 3 and 5,120,539.6667 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 | 15,361,619 | |
| -1 | -15,361,619 |
Let's try dividing by 4:
15,361,619 ÷ 4 = 3,840,404.75
If the quotient is a whole number, then 4 and 3,840,404.75 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 | 15,361,619 | |
| -1 | 15,361,619 |
If you did it right, you will end up with this table:
| 1 | 7 | 13 | 29 | 91 | 203 | 377 | 2,639 | 5,821 | 40,747 | 75,673 | 168,809 | 529,711 | 1,181,663 | 2,194,517 | 15,361,619 |
| -1 | -7 | -13 | -29 | -91 | -203 | -377 | -2,639 | -5,821 | -40,747 | -75,673 | -168,809 | -529,711 | -1,181,663 | -2,194,517 | -15,361,619 |
Here are some more numbers to try:
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