To find all the divisors of the number 10,416:
- 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 10,416:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
10,416 = 24 × 3 × 7 × 31
10,416 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 = (4 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 5 × 2 × 2 × 2 = 40
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 10,416
- 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 = 2
3 =
8
composite factor = 2
2 × 3 =
12
composite factor = 2 × 7 =
14
composite factor = 2
4 =
16
composite factor = 3 × 7 =
21
composite factor = 2
3 × 3 =
24
composite factor = 2
2 × 7 =
28
prime factor =
31
composite factor = 2 × 3 × 7 =
42
composite factor = 2
4 × 3 =
48
composite factor = 2
3 × 7 =
56
composite factor = 2 × 31 =
62
composite factor = 2
2 × 3 × 7 =
84
composite factor = 3 × 31 =
93
This list continues below...
... This list continues from above
composite factor = 2
4 × 7 =
112
composite factor = 2
2 × 31 =
124
composite factor = 2
3 × 3 × 7 =
168
composite factor = 2 × 3 × 31 =
186
composite factor = 7 × 31 =
217
composite factor = 2
3 × 31 =
248
composite factor = 2
4 × 3 × 7 =
336
composite factor = 2
2 × 3 × 31 =
372
composite factor = 2 × 7 × 31 =
434
composite factor = 2
4 × 31 =
496
composite factor = 3 × 7 × 31 =
651
composite factor = 2
3 × 3 × 31 =
744
composite factor = 2
2 × 7 × 31 =
868
composite factor = 2 × 3 × 7 × 31 =
1,302
composite factor = 2
4 × 3 × 31 =
1,488
composite factor = 2
3 × 7 × 31 =
1,736
composite factor = 2
2 × 3 × 7 × 31 =
2,604
composite factor = 2
4 × 7 × 31 =
3,472
composite factor = 2
3 × 3 × 7 × 31 =
5,208
composite factor = 2
4 × 3 × 7 × 31 =
10,416
40 factors (divisors)
What times what is 10,416?
What number multiplied by what number equals 10,416?
All the combinations of any two natural numbers whose product equals 10,416.
1 × 10,416 = 10,416
2 × 5,208 = 10,416
3 × 3,472 = 10,416
4 × 2,604 = 10,416
6 × 1,736 = 10,416
7 × 1,488 = 10,416
8 × 1,302 = 10,416
12 × 868 = 10,416
14 × 744 = 10,416
16 × 651 = 10,416
21 × 496 = 10,416
24 × 434 = 10,416
28 × 372 = 10,416
31 × 336 = 10,416
42 × 248 = 10,416
48 × 217 = 10,416
56 × 186 = 10,416
62 × 168 = 10,416
84 × 124 = 10,416
93 × 112 = 10,416
20 unique multiplications The final answer:
(scroll down)