To find all the divisors of the number 710,080:
- 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 710,080:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
710,080 = 26 × 5 × 7 × 317
710,080 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 = (6 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 7 × 2 × 2 × 2 = 56
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 710,080
- 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
prime factor =
7
composite factor = 2
3 =
8
composite factor = 2 × 5 =
10
composite factor = 2 × 7 =
14
composite factor = 2
4 =
16
composite factor = 2
2 × 5 =
20
composite factor = 2
2 × 7 =
28
composite factor = 2
5 =
32
composite factor = 5 × 7 =
35
composite factor = 2
3 × 5 =
40
composite factor = 2
3 × 7 =
56
composite factor = 2
6 =
64
composite factor = 2 × 5 × 7 =
70
composite factor = 2
4 × 5 =
80
composite factor = 2
4 × 7 =
112
composite factor = 2
2 × 5 × 7 =
140
composite factor = 2
5 × 5 =
160
composite factor = 2
5 × 7 =
224
composite factor = 2
3 × 5 × 7 =
280
prime factor =
317
composite factor = 2
6 × 5 =
320
composite factor = 2
6 × 7 =
448
composite factor = 2
4 × 5 × 7 =
560
composite factor = 2 × 317 =
634
This list continues below...
... This list continues from above
composite factor = 2
5 × 5 × 7 =
1,120
composite factor = 2
2 × 317 =
1,268
composite factor = 5 × 317 =
1,585
composite factor = 7 × 317 =
2,219
composite factor = 2
6 × 5 × 7 =
2,240
composite factor = 2
3 × 317 =
2,536
composite factor = 2 × 5 × 317 =
3,170
composite factor = 2 × 7 × 317 =
4,438
composite factor = 2
4 × 317 =
5,072
composite factor = 2
2 × 5 × 317 =
6,340
composite factor = 2
2 × 7 × 317 =
8,876
composite factor = 2
5 × 317 =
10,144
composite factor = 5 × 7 × 317 =
11,095
composite factor = 2
3 × 5 × 317 =
12,680
composite factor = 2
3 × 7 × 317 =
17,752
composite factor = 2
6 × 317 =
20,288
composite factor = 2 × 5 × 7 × 317 =
22,190
composite factor = 2
4 × 5 × 317 =
25,360
composite factor = 2
4 × 7 × 317 =
35,504
composite factor = 2
2 × 5 × 7 × 317 =
44,380
composite factor = 2
5 × 5 × 317 =
50,720
composite factor = 2
5 × 7 × 317 =
71,008
composite factor = 2
3 × 5 × 7 × 317 =
88,760
composite factor = 2
6 × 5 × 317 =
101,440
composite factor = 2
6 × 7 × 317 =
142,016
composite factor = 2
4 × 5 × 7 × 317 =
177,520
composite factor = 2
5 × 5 × 7 × 317 =
355,040
composite factor = 2
6 × 5 × 7 × 317 =
710,080
56 factors (divisors)
What times what is 710,080?
What number multiplied by what number equals 710,080?
All the combinations of any two natural numbers whose product equals 710,080.
1 × 710,080 = 710,080
2 × 355,040 = 710,080
4 × 177,520 = 710,080
5 × 142,016 = 710,080
7 × 101,440 = 710,080
8 × 88,760 = 710,080
10 × 71,008 = 710,080
14 × 50,720 = 710,080
16 × 44,380 = 710,080
20 × 35,504 = 710,080
28 × 25,360 = 710,080
32 × 22,190 = 710,080
35 × 20,288 = 710,080
40 × 17,752 = 710,080
56 × 12,680 = 710,080
64 × 11,095 = 710,080
70 × 10,144 = 710,080
80 × 8,876 = 710,080
112 × 6,340 = 710,080
140 × 5,072 = 710,080
160 × 4,438 = 710,080
224 × 3,170 = 710,080
280 × 2,536 = 710,080
317 × 2,240 = 710,080
320 × 2,219 = 710,080
448 × 1,585 = 710,080
560 × 1,268 = 710,080
634 × 1,120 = 710,080
28 unique multiplications The final answer:
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