To find all the divisors of the number 315,756:
- 1. Decompose the number into prime factors.
- See how you can find out how many factors (divisors) the number has, without actually calculating them.
- 2. Multiply the prime factors in all their unique combinations, that yield different results.
1. Carry out the prime factorization of the number 315,756:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
315,756 = 22 × 32 × 72 × 179
315,756 is not a prime number but a composite one.
- Prime number: a natural number that is divisible (divided evenly) only by 1 and itself. A prime number has exactly two factors: 1 and the number itself.
- Examples of prime numbers: 2 (factors 1, 2), 3 (factors 1, 3), 5 (factors 1, 5), 7 (factors 1, 7), 11 (factors 1, 11), 13 (factors 1, 13), ...
- Composite number: a natural number that has at least one factor other than 1 and itself. So it is neither a prime number nor 1.
- Examples of composite numbers: 4 (it has 3 factors: 1, 2, 4), 6 (it has 4 factors: 1, 2, 3, 6), 8 (it has 4 factors: 1, 2, 4, 8), 9 (it has 3 factors: 1, 3, 9), 10 (it has 4 factors: 1, 2, 5, 10), 12 (it has 6 factors: 1, 2, 3, 4, 6, 12), ...
How to count the number of factors of a number?
Without actually finding the factors
- If a number N is prime factorized as:
N = am × bk × cz
where a, b, c are the prime factors and m, k, z are their exponents, natural numbers, .... - ...
- Then the number of factors of the number N can be calculated as:
n = (m + 1) × (k + 1) × (z + 1) - ...
- In our case, the number of factors is calculated as:
- n = (2 + 1) × (2 + 1) × (2 + 1) × (1 + 1) = 3 × 3 × 3 × 2 = 54
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 315,756
- Multiply the prime factors involved in the prime factorization of the number in all their unique combinations, that give different results.
- Also consider the exponents of these prime factors.
- Also add 1 to the list of factors (divisors). All the numbers are divisible by 1.
All the factors (divisors) are listed below - in ascending order
The list of factors (divisors):
Numbers other than 1 that are not prime factors are composite factors (divisors).
neither prime nor composite =
1
prime factor =
2
prime factor =
3
composite factor = 2
2 =
4
composite factor = 2 × 3 =
6
prime factor =
7
composite factor = 3
2 =
9
composite factor = 2
2 × 3 =
12
composite factor = 2 × 7 =
14
composite factor = 2 × 3
2 =
18
composite factor = 3 × 7 =
21
composite factor = 2
2 × 7 =
28
composite factor = 2
2 × 3
2 =
36
composite factor = 2 × 3 × 7 =
42
composite factor = 7
2 =
49
composite factor = 3
2 × 7 =
63
composite factor = 2
2 × 3 × 7 =
84
composite factor = 2 × 7
2 =
98
composite factor = 2 × 3
2 × 7 =
126
composite factor = 3 × 7
2 =
147
prime factor =
179
composite factor = 2
2 × 7
2 =
196
composite factor = 2
2 × 3
2 × 7 =
252
composite factor = 2 × 3 × 7
2 =
294
composite factor = 2 × 179 =
358
composite factor = 3
2 × 7
2 =
441
composite factor = 3 × 179 =
537
This list continues below...
... This list continues from above
composite factor = 2
2 × 3 × 7
2 =
588
composite factor = 2
2 × 179 =
716
composite factor = 2 × 3
2 × 7
2 =
882
composite factor = 2 × 3 × 179 =
1,074
composite factor = 7 × 179 =
1,253
composite factor = 3
2 × 179 =
1,611
composite factor = 2
2 × 3
2 × 7
2 =
1,764
composite factor = 2
2 × 3 × 179 =
2,148
composite factor = 2 × 7 × 179 =
2,506
composite factor = 2 × 3
2 × 179 =
3,222
composite factor = 3 × 7 × 179 =
3,759
composite factor = 2
2 × 7 × 179 =
5,012
composite factor = 2
2 × 3
2 × 179 =
6,444
composite factor = 2 × 3 × 7 × 179 =
7,518
composite factor = 7
2 × 179 =
8,771
composite factor = 3
2 × 7 × 179 =
11,277
composite factor = 2
2 × 3 × 7 × 179 =
15,036
composite factor = 2 × 7
2 × 179 =
17,542
composite factor = 2 × 3
2 × 7 × 179 =
22,554
composite factor = 3 × 7
2 × 179 =
26,313
composite factor = 2
2 × 7
2 × 179 =
35,084
composite factor = 2
2 × 3
2 × 7 × 179 =
45,108
composite factor = 2 × 3 × 7
2 × 179 =
52,626
composite factor = 3
2 × 7
2 × 179 =
78,939
composite factor = 2
2 × 3 × 7
2 × 179 =
105,252
composite factor = 2 × 3
2 × 7
2 × 179 =
157,878
composite factor = 2
2 × 3
2 × 7
2 × 179 =
315,756
54 factors (divisors)
What times what is 315,756?
What number multiplied by what number equals 315,756?
All the combinations of any two natural numbers whose product equals 315,756.
1 × 315,756 = 315,756
2 × 157,878 = 315,756
3 × 105,252 = 315,756
4 × 78,939 = 315,756
6 × 52,626 = 315,756
7 × 45,108 = 315,756
9 × 35,084 = 315,756
12 × 26,313 = 315,756
14 × 22,554 = 315,756
18 × 17,542 = 315,756
21 × 15,036 = 315,756
28 × 11,277 = 315,756
36 × 8,771 = 315,756
42 × 7,518 = 315,756
49 × 6,444 = 315,756
63 × 5,012 = 315,756
84 × 3,759 = 315,756
98 × 3,222 = 315,756
126 × 2,506 = 315,756
147 × 2,148 = 315,756
179 × 1,764 = 315,756
196 × 1,611 = 315,756
252 × 1,253 = 315,756
294 × 1,074 = 315,756
358 × 882 = 315,756
441 × 716 = 315,756
537 × 588 = 315,756
27 unique multiplications The final answer:
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