To find all the divisors of the number 846,800:
- 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 846,800:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
846,800 = 24 × 52 × 29 × 73
846,800 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 846,800
- 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
composite factor = 2
4 =
16
composite factor = 2
2 × 5 =
20
composite factor = 5
2 =
25
prime factor =
29
composite factor = 2
3 × 5 =
40
composite factor = 2 × 5
2 =
50
composite factor = 2 × 29 =
58
prime factor =
73
composite factor = 2
4 × 5 =
80
composite factor = 2
2 × 5
2 =
100
composite factor = 2
2 × 29 =
116
composite factor = 5 × 29 =
145
composite factor = 2 × 73 =
146
composite factor = 2
3 × 5
2 =
200
composite factor = 2
3 × 29 =
232
composite factor = 2 × 5 × 29 =
290
composite factor = 2
2 × 73 =
292
composite factor = 5 × 73 =
365
composite factor = 2
4 × 5
2 =
400
composite factor = 2
4 × 29 =
464
composite factor = 2
2 × 5 × 29 =
580
composite factor = 2
3 × 73 =
584
composite factor = 5
2 × 29 =
725
composite factor = 2 × 5 × 73 =
730
This list continues below...
... This list continues from above
composite factor = 2
3 × 5 × 29 =
1,160
composite factor = 2
4 × 73 =
1,168
composite factor = 2 × 5
2 × 29 =
1,450
composite factor = 2
2 × 5 × 73 =
1,460
composite factor = 5
2 × 73 =
1,825
composite factor = 29 × 73 =
2,117
composite factor = 2
4 × 5 × 29 =
2,320
composite factor = 2
2 × 5
2 × 29 =
2,900
composite factor = 2
3 × 5 × 73 =
2,920
composite factor = 2 × 5
2 × 73 =
3,650
composite factor = 2 × 29 × 73 =
4,234
composite factor = 2
3 × 5
2 × 29 =
5,800
composite factor = 2
4 × 5 × 73 =
5,840
composite factor = 2
2 × 5
2 × 73 =
7,300
composite factor = 2
2 × 29 × 73 =
8,468
composite factor = 5 × 29 × 73 =
10,585
composite factor = 2
4 × 5
2 × 29 =
11,600
composite factor = 2
3 × 5
2 × 73 =
14,600
composite factor = 2
3 × 29 × 73 =
16,936
composite factor = 2 × 5 × 29 × 73 =
21,170
composite factor = 2
4 × 5
2 × 73 =
29,200
composite factor = 2
4 × 29 × 73 =
33,872
composite factor = 2
2 × 5 × 29 × 73 =
42,340
composite factor = 5
2 × 29 × 73 =
52,925
composite factor = 2
3 × 5 × 29 × 73 =
84,680
composite factor = 2 × 5
2 × 29 × 73 =
105,850
composite factor = 2
4 × 5 × 29 × 73 =
169,360
composite factor = 2
2 × 5
2 × 29 × 73 =
211,700
composite factor = 2
3 × 5
2 × 29 × 73 =
423,400
composite factor = 2
4 × 5
2 × 29 × 73 =
846,800
60 factors (divisors)
What times what is 846,800?
What number multiplied by what number equals 846,800?
All the combinations of any two natural numbers whose product equals 846,800.
1 × 846,800 = 846,800
2 × 423,400 = 846,800
4 × 211,700 = 846,800
5 × 169,360 = 846,800
8 × 105,850 = 846,800
10 × 84,680 = 846,800
16 × 52,925 = 846,800
20 × 42,340 = 846,800
25 × 33,872 = 846,800
29 × 29,200 = 846,800
40 × 21,170 = 846,800
50 × 16,936 = 846,800
58 × 14,600 = 846,800
73 × 11,600 = 846,800
80 × 10,585 = 846,800
100 × 8,468 = 846,800
116 × 7,300 = 846,800
145 × 5,840 = 846,800
146 × 5,800 = 846,800
200 × 4,234 = 846,800
232 × 3,650 = 846,800
290 × 2,920 = 846,800
292 × 2,900 = 846,800
365 × 2,320 = 846,800
400 × 2,117 = 846,800
464 × 1,825 = 846,800
580 × 1,460 = 846,800
584 × 1,450 = 846,800
725 × 1,168 = 846,800
730 × 1,160 = 846,800
30 unique multiplications The final answer:
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