A:
Positive:
1 x 1503069113 x 115620719 x 79108931 x 484861151 x 99541169 x 88939247 x 60853403 x 37297589 x 255191963 x 76572869 x 52393211 x 4681
Negative:
-1 x -15030691-13 x -1156207-19 x -791089-31 x -484861-151 x -99541-169 x -88939-247 x -60853-403 x -37297-589 x -25519-1963 x -7657-2869 x -5239-3211 x -4681
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 15,030,691, 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 | 15,030,691 | |
| -1 | -15,030,691 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,030,691.
Example:
1 x 15,030,691 = 15,030,691
and
-1 x -15,030,691 = 15,030,691
Notice both answers equal 15,030,691
With that explanation out of the way, let's continue. Next, we take the number 15,030,691 and divide it by 2:
15,030,691 ÷ 2 = 7,515,345.5
If the quotient is a whole number, then 2 and 7,515,345.5 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 | 15,030,691 | |
| -1 | -15,030,691 |
Now, we try dividing 15,030,691 by 3:
15,030,691 ÷ 3 = 5,010,230.3333
If the quotient is a whole number, then 3 and 5,010,230.3333 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 | 15,030,691 | |
| -1 | -15,030,691 |
Let's try dividing by 4:
15,030,691 ÷ 4 = 3,757,672.75
If the quotient is a whole number, then 4 and 3,757,672.75 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 | 15,030,691 | |
| -1 | 15,030,691 |
If you did it right, you will end up with this table:
| 1 | 13 | 19 | 31 | 151 | 169 | 247 | 403 | 589 | 1,963 | 2,869 | 3,211 | 4,681 | 5,239 | 7,657 | 25,519 | 37,297 | 60,853 | 88,939 | 99,541 | 484,861 | 791,089 | 1,156,207 | 15,030,691 |
| -1 | -13 | -19 | -31 | -151 | -169 | -247 | -403 | -589 | -1,963 | -2,869 | -3,211 | -4,681 | -5,239 | -7,657 | -25,519 | -37,297 | -60,853 | -88,939 | -99,541 | -484,861 | -791,089 | -1,156,207 | -15,030,691 |
Here are some more numbers to try:
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