To find all the divisors of the number 565,810:
- 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 565,810:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
565,810 = 2 × 5 × 7 × 59 × 137
565,810 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 = (1 + 1) × (1 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 2 × 2 × 2 × 2 × 2 = 32
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 565,810
- Multiply the prime factors involved in the prime factorization of the number in all their unique combinations, that give different results.
- 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 =
5
prime factor =
7
composite factor = 2 × 5 =
10
composite factor = 2 × 7 =
14
composite factor = 5 × 7 =
35
prime factor =
59
composite factor = 2 × 5 × 7 =
70
composite factor = 2 × 59 =
118
prime factor =
137
composite factor = 2 × 137 =
274
composite factor = 5 × 59 =
295
composite factor = 7 × 59 =
413
composite factor = 2 × 5 × 59 =
590
composite factor = 5 × 137 =
685
This list continues below...
... This list continues from above
composite factor = 2 × 7 × 59 =
826
composite factor = 7 × 137 =
959
composite factor = 2 × 5 × 137 =
1,370
composite factor = 2 × 7 × 137 =
1,918
composite factor = 5 × 7 × 59 =
2,065
composite factor = 2 × 5 × 7 × 59 =
4,130
composite factor = 5 × 7 × 137 =
4,795
composite factor = 59 × 137 =
8,083
composite factor = 2 × 5 × 7 × 137 =
9,590
composite factor = 2 × 59 × 137 =
16,166
composite factor = 5 × 59 × 137 =
40,415
composite factor = 7 × 59 × 137 =
56,581
composite factor = 2 × 5 × 59 × 137 =
80,830
composite factor = 2 × 7 × 59 × 137 =
113,162
composite factor = 5 × 7 × 59 × 137 =
282,905
composite factor = 2 × 5 × 7 × 59 × 137 =
565,810
32 factors (divisors)
What times what is 565,810?
What number multiplied by what number equals 565,810?
All the combinations of any two natural numbers whose product equals 565,810.
1 × 565,810 = 565,810
2 × 282,905 = 565,810
5 × 113,162 = 565,810
7 × 80,830 = 565,810
10 × 56,581 = 565,810
14 × 40,415 = 565,810
35 × 16,166 = 565,810
59 × 9,590 = 565,810
70 × 8,083 = 565,810
118 × 4,795 = 565,810
137 × 4,130 = 565,810
274 × 2,065 = 565,810
295 × 1,918 = 565,810
413 × 1,370 = 565,810
590 × 959 = 565,810
685 × 826 = 565,810
16 unique multiplications The final answer:
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