A:
Positive:
1 x 154022755 x 30804557 x 220032525 x 61609135 x 440065175 x 88013283 x 54425311 x 495251415 x 108851555 x 99051981 x 77752177 x 7075
Negative:
-1 x -15402275-5 x -3080455-7 x -2200325-25 x -616091-35 x -440065-175 x -88013-283 x -54425-311 x -49525-1415 x -10885-1555 x -9905-1981 x -7775-2177 x -7075
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 15,402,275, 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 | 15,402,275 | |
| -1 | -15,402,275 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,402,275.
Example:
1 x 15,402,275 = 15,402,275
and
-1 x -15,402,275 = 15,402,275
Notice both answers equal 15,402,275
With that explanation out of the way, let's continue. Next, we take the number 15,402,275 and divide it by 2:
15,402,275 ÷ 2 = 7,701,137.5
If the quotient is a whole number, then 2 and 7,701,137.5 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 | 15,402,275 | |
| -1 | -15,402,275 |
Now, we try dividing 15,402,275 by 3:
15,402,275 ÷ 3 = 5,134,091.6667
If the quotient is a whole number, then 3 and 5,134,091.6667 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 | 15,402,275 | |
| -1 | -15,402,275 |
Let's try dividing by 4:
15,402,275 ÷ 4 = 3,850,568.75
If the quotient is a whole number, then 4 and 3,850,568.75 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 | 15,402,275 | |
| -1 | 15,402,275 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 25 | 35 | 175 | 283 | 311 | 1,415 | 1,555 | 1,981 | 2,177 | 7,075 | 7,775 | 9,905 | 10,885 | 49,525 | 54,425 | 88,013 | 440,065 | 616,091 | 2,200,325 | 3,080,455 | 15,402,275 |
| -1 | -5 | -7 | -25 | -35 | -175 | -283 | -311 | -1,415 | -1,555 | -1,981 | -2,177 | -7,075 | -7,775 | -9,905 | -10,885 | -49,525 | -54,425 | -88,013 | -440,065 | -616,091 | -2,200,325 | -3,080,455 | -15,402,275 |
Here are some more numbers to try:
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