To find all the divisors of the number 23,868:
- 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 23,868:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
23,868 = 22 × 33 × 13 × 17
23,868 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) × (3 + 1) × (1 + 1) × (1 + 1) = 3 × 4 × 2 × 2 = 48
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 23,868
- 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
composite factor = 3
2 =
9
composite factor = 2
2 × 3 =
12
prime factor =
13
prime factor =
17
composite factor = 2 × 3
2 =
18
composite factor = 2 × 13 =
26
composite factor = 3
3 =
27
composite factor = 2 × 17 =
34
composite factor = 2
2 × 3
2 =
36
composite factor = 3 × 13 =
39
composite factor = 3 × 17 =
51
composite factor = 2
2 × 13 =
52
composite factor = 2 × 3
3 =
54
composite factor = 2
2 × 17 =
68
composite factor = 2 × 3 × 13 =
78
composite factor = 2 × 3 × 17 =
102
composite factor = 2
2 × 3
3 =
108
composite factor = 3
2 × 13 =
117
composite factor = 3
2 × 17 =
153
This list continues below...
... This list continues from above
composite factor = 2
2 × 3 × 13 =
156
composite factor = 2
2 × 3 × 17 =
204
composite factor = 13 × 17 =
221
composite factor = 2 × 3
2 × 13 =
234
composite factor = 2 × 3
2 × 17 =
306
composite factor = 3
3 × 13 =
351
composite factor = 2 × 13 × 17 =
442
composite factor = 3
3 × 17 =
459
composite factor = 2
2 × 3
2 × 13 =
468
composite factor = 2
2 × 3
2 × 17 =
612
composite factor = 3 × 13 × 17 =
663
composite factor = 2 × 3
3 × 13 =
702
composite factor = 2
2 × 13 × 17 =
884
composite factor = 2 × 3
3 × 17 =
918
composite factor = 2 × 3 × 13 × 17 =
1,326
composite factor = 2
2 × 3
3 × 13 =
1,404
composite factor = 2
2 × 3
3 × 17 =
1,836
composite factor = 3
2 × 13 × 17 =
1,989
composite factor = 2
2 × 3 × 13 × 17 =
2,652
composite factor = 2 × 3
2 × 13 × 17 =
3,978
composite factor = 3
3 × 13 × 17 =
5,967
composite factor = 2
2 × 3
2 × 13 × 17 =
7,956
composite factor = 2 × 3
3 × 13 × 17 =
11,934
composite factor = 2
2 × 3
3 × 13 × 17 =
23,868
48 factors (divisors)
What times what is 23,868?
What number multiplied by what number equals 23,868?
All the combinations of any two natural numbers whose product equals 23,868.
1 × 23,868 = 23,868
2 × 11,934 = 23,868
3 × 7,956 = 23,868
4 × 5,967 = 23,868
6 × 3,978 = 23,868
9 × 2,652 = 23,868
12 × 1,989 = 23,868
13 × 1,836 = 23,868
17 × 1,404 = 23,868
18 × 1,326 = 23,868
26 × 918 = 23,868
27 × 884 = 23,868
34 × 702 = 23,868
36 × 663 = 23,868
39 × 612 = 23,868
51 × 468 = 23,868
52 × 459 = 23,868
54 × 442 = 23,868
68 × 351 = 23,868
78 × 306 = 23,868
102 × 234 = 23,868
108 × 221 = 23,868
117 × 204 = 23,868
153 × 156 = 23,868
24 unique multiplications The final answer:
(scroll down)