To find all the divisors of the number 23,360:
- 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 23,360:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
23,360 = 26 × 5 × 73
23,360 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 = (6 + 1) × (1 + 1) × (1 + 1) = 7 × 2 × 2 = 28
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 23,360
- 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
composite factor = 2
2 =
4
prime factor =
5
composite factor = 2
3 =
8
composite factor = 2 × 5 =
10
composite factor = 2
4 =
16
composite factor = 2
2 × 5 =
20
composite factor = 2
5 =
32
composite factor = 2
3 × 5 =
40
composite factor = 2
6 =
64
prime factor =
73
composite factor = 2
4 × 5 =
80
composite factor = 2 × 73 =
146
This list continues below...
... This list continues from above
composite factor = 2
5 × 5 =
160
composite factor = 2
2 × 73 =
292
composite factor = 2
6 × 5 =
320
composite factor = 5 × 73 =
365
composite factor = 2
3 × 73 =
584
composite factor = 2 × 5 × 73 =
730
composite factor = 2
4 × 73 =
1,168
composite factor = 2
2 × 5 × 73 =
1,460
composite factor = 2
5 × 73 =
2,336
composite factor = 2
3 × 5 × 73 =
2,920
composite factor = 2
6 × 73 =
4,672
composite factor = 2
4 × 5 × 73 =
5,840
composite factor = 2
5 × 5 × 73 =
11,680
composite factor = 2
6 × 5 × 73 =
23,360
28 factors (divisors)
What times what is 23,360?
What number multiplied by what number equals 23,360?
All the combinations of any two natural numbers whose product equals 23,360.
1 × 23,360 = 23,360
2 × 11,680 = 23,360
4 × 5,840 = 23,360
5 × 4,672 = 23,360
8 × 2,920 = 23,360
10 × 2,336 = 23,360
16 × 1,460 = 23,360
20 × 1,168 = 23,360
32 × 730 = 23,360
40 × 584 = 23,360
64 × 365 = 23,360
73 × 320 = 23,360
80 × 292 = 23,360
146 × 160 = 23,360
14 unique multiplications The final answer:
(scroll down)