To find all the divisors of the number 460,880:
- 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 460,880:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
460,880 = 24 × 5 × 7 × 823
460,880 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 460,880
- 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 = 5 × 7 =
35
composite factor = 2
3 × 5 =
40
composite factor = 2
3 × 7 =
56
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
3 × 5 × 7 =
280
composite factor = 2
4 × 5 × 7 =
560
This list continues below...
... This list continues from above
prime factor =
823
composite factor = 2 × 823 =
1,646
composite factor = 2
2 × 823 =
3,292
composite factor = 5 × 823 =
4,115
composite factor = 7 × 823 =
5,761
composite factor = 2
3 × 823 =
6,584
composite factor = 2 × 5 × 823 =
8,230
composite factor = 2 × 7 × 823 =
11,522
composite factor = 2
4 × 823 =
13,168
composite factor = 2
2 × 5 × 823 =
16,460
composite factor = 2
2 × 7 × 823 =
23,044
composite factor = 5 × 7 × 823 =
28,805
composite factor = 2
3 × 5 × 823 =
32,920
composite factor = 2
3 × 7 × 823 =
46,088
composite factor = 2 × 5 × 7 × 823 =
57,610
composite factor = 2
4 × 5 × 823 =
65,840
composite factor = 2
4 × 7 × 823 =
92,176
composite factor = 2
2 × 5 × 7 × 823 =
115,220
composite factor = 2
3 × 5 × 7 × 823 =
230,440
composite factor = 2
4 × 5 × 7 × 823 =
460,880
40 factors (divisors)
What times what is 460,880?
What number multiplied by what number equals 460,880?
All the combinations of any two natural numbers whose product equals 460,880.
1 × 460,880 = 460,880
2 × 230,440 = 460,880
4 × 115,220 = 460,880
5 × 92,176 = 460,880
7 × 65,840 = 460,880
8 × 57,610 = 460,880
10 × 46,088 = 460,880
14 × 32,920 = 460,880
16 × 28,805 = 460,880
20 × 23,044 = 460,880
28 × 16,460 = 460,880
35 × 13,168 = 460,880
40 × 11,522 = 460,880
56 × 8,230 = 460,880
70 × 6,584 = 460,880
80 × 5,761 = 460,880
112 × 4,115 = 460,880
140 × 3,292 = 460,880
280 × 1,646 = 460,880
560 × 823 = 460,880
20 unique multiplications The final answer:
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