To find all the divisors of the number 206,800:
- 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 206,800:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
206,800 = 24 × 52 × 11 × 47
206,800 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) × (2 + 1) × (1 + 1) × (1 + 1) = 5 × 3 × 2 × 2 = 60
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 206,800
- 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
prime factor =
11
composite factor = 2
4 =
16
composite factor = 2
2 × 5 =
20
composite factor = 2 × 11 =
22
composite factor = 5
2 =
25
composite factor = 2
3 × 5 =
40
composite factor = 2
2 × 11 =
44
prime factor =
47
composite factor = 2 × 5
2 =
50
composite factor = 5 × 11 =
55
composite factor = 2
4 × 5 =
80
composite factor = 2
3 × 11 =
88
composite factor = 2 × 47 =
94
composite factor = 2
2 × 5
2 =
100
composite factor = 2 × 5 × 11 =
110
composite factor = 2
4 × 11 =
176
composite factor = 2
2 × 47 =
188
composite factor = 2
3 × 5
2 =
200
composite factor = 2
2 × 5 × 11 =
220
composite factor = 5 × 47 =
235
composite factor = 5
2 × 11 =
275
composite factor = 2
3 × 47 =
376
composite factor = 2
4 × 5
2 =
400
composite factor = 2
3 × 5 × 11 =
440
This list continues below...
... This list continues from above
composite factor = 2 × 5 × 47 =
470
composite factor = 11 × 47 =
517
composite factor = 2 × 5
2 × 11 =
550
composite factor = 2
4 × 47 =
752
composite factor = 2
4 × 5 × 11 =
880
composite factor = 2
2 × 5 × 47 =
940
composite factor = 2 × 11 × 47 =
1,034
composite factor = 2
2 × 5
2 × 11 =
1,100
composite factor = 5
2 × 47 =
1,175
composite factor = 2
3 × 5 × 47 =
1,880
composite factor = 2
2 × 11 × 47 =
2,068
composite factor = 2
3 × 5
2 × 11 =
2,200
composite factor = 2 × 5
2 × 47 =
2,350
composite factor = 5 × 11 × 47 =
2,585
composite factor = 2
4 × 5 × 47 =
3,760
composite factor = 2
3 × 11 × 47 =
4,136
composite factor = 2
4 × 5
2 × 11 =
4,400
composite factor = 2
2 × 5
2 × 47 =
4,700
composite factor = 2 × 5 × 11 × 47 =
5,170
composite factor = 2
4 × 11 × 47 =
8,272
composite factor = 2
3 × 5
2 × 47 =
9,400
composite factor = 2
2 × 5 × 11 × 47 =
10,340
composite factor = 5
2 × 11 × 47 =
12,925
composite factor = 2
4 × 5
2 × 47 =
18,800
composite factor = 2
3 × 5 × 11 × 47 =
20,680
composite factor = 2 × 5
2 × 11 × 47 =
25,850
composite factor = 2
4 × 5 × 11 × 47 =
41,360
composite factor = 2
2 × 5
2 × 11 × 47 =
51,700
composite factor = 2
3 × 5
2 × 11 × 47 =
103,400
composite factor = 2
4 × 5
2 × 11 × 47 =
206,800
60 factors (divisors)
What times what is 206,800?
What number multiplied by what number equals 206,800?
All the combinations of any two natural numbers whose product equals 206,800.
1 × 206,800 = 206,800
2 × 103,400 = 206,800
4 × 51,700 = 206,800
5 × 41,360 = 206,800
8 × 25,850 = 206,800
10 × 20,680 = 206,800
11 × 18,800 = 206,800
16 × 12,925 = 206,800
20 × 10,340 = 206,800
22 × 9,400 = 206,800
25 × 8,272 = 206,800
40 × 5,170 = 206,800
44 × 4,700 = 206,800
47 × 4,400 = 206,800
50 × 4,136 = 206,800
55 × 3,760 = 206,800
80 × 2,585 = 206,800
88 × 2,350 = 206,800
94 × 2,200 = 206,800
100 × 2,068 = 206,800
110 × 1,880 = 206,800
176 × 1,175 = 206,800
188 × 1,100 = 206,800
200 × 1,034 = 206,800
220 × 940 = 206,800
235 × 880 = 206,800
275 × 752 = 206,800
376 × 550 = 206,800
400 × 517 = 206,800
440 × 470 = 206,800
30 unique multiplications The final answer:
(scroll down)