To find all the divisors of the number 4,260,800:
- 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 4,260,800:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
4,260,800 = 26 × 52 × 2,663
4,260,800 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 = (6 + 1) × (2 + 1) × (1 + 1) = 7 × 3 × 2 = 42
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 4,260,800
- 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
composite factor = 2
5 =
32
composite factor = 2
3 × 5 =
40
composite factor = 2 × 5
2 =
50
composite factor = 2
6 =
64
composite factor = 2
4 × 5 =
80
composite factor = 2
2 × 5
2 =
100
composite factor = 2
5 × 5 =
160
composite factor = 2
3 × 5
2 =
200
composite factor = 2
6 × 5 =
320
composite factor = 2
4 × 5
2 =
400
composite factor = 2
5 × 5
2 =
800
composite factor = 2
6 × 5
2 =
1,600
This list continues below...
... This list continues from above
prime factor =
2,663
composite factor = 2 × 2,663 =
5,326
composite factor = 2
2 × 2,663 =
10,652
composite factor = 5 × 2,663 =
13,315
composite factor = 2
3 × 2,663 =
21,304
composite factor = 2 × 5 × 2,663 =
26,630
composite factor = 2
4 × 2,663 =
42,608
composite factor = 2
2 × 5 × 2,663 =
53,260
composite factor = 5
2 × 2,663 =
66,575
composite factor = 2
5 × 2,663 =
85,216
composite factor = 2
3 × 5 × 2,663 =
106,520
composite factor = 2 × 5
2 × 2,663 =
133,150
composite factor = 2
6 × 2,663 =
170,432
composite factor = 2
4 × 5 × 2,663 =
213,040
composite factor = 2
2 × 5
2 × 2,663 =
266,300
composite factor = 2
5 × 5 × 2,663 =
426,080
composite factor = 2
3 × 5
2 × 2,663 =
532,600
composite factor = 2
6 × 5 × 2,663 =
852,160
composite factor = 2
4 × 5
2 × 2,663 =
1,065,200
composite factor = 2
5 × 5
2 × 2,663 =
2,130,400
composite factor = 2
6 × 5
2 × 2,663 =
4,260,800
42 factors (divisors)
What times what is 4,260,800?
What number multiplied by what number equals 4,260,800?
All the combinations of any two natural numbers whose product equals 4,260,800.
1 × 4,260,800 = 4,260,800
2 × 2,130,400 = 4,260,800
4 × 1,065,200 = 4,260,800
5 × 852,160 = 4,260,800
8 × 532,600 = 4,260,800
10 × 426,080 = 4,260,800
16 × 266,300 = 4,260,800
20 × 213,040 = 4,260,800
25 × 170,432 = 4,260,800
32 × 133,150 = 4,260,800
40 × 106,520 = 4,260,800
50 × 85,216 = 4,260,800
64 × 66,575 = 4,260,800
80 × 53,260 = 4,260,800
100 × 42,608 = 4,260,800
160 × 26,630 = 4,260,800
200 × 21,304 = 4,260,800
320 × 13,315 = 4,260,800
400 × 10,652 = 4,260,800
800 × 5,326 = 4,260,800
1,600 × 2,663 = 4,260,800
21 unique multiplications The final answer:
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