To find all the divisors of the number 4,013,220:
- 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 4,013,220:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
4,013,220 = 22 × 3 × 5 × 211 × 317
4,013,220 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 = (2 + 1) × (1 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 3 × 2 × 2 × 2 × 2 = 48
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 4,013,220
- 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
prime factor =
3
composite factor = 2
2 =
4
prime factor =
5
composite factor = 2 × 3 =
6
composite factor = 2 × 5 =
10
composite factor = 2
2 × 3 =
12
composite factor = 3 × 5 =
15
composite factor = 2
2 × 5 =
20
composite factor = 2 × 3 × 5 =
30
composite factor = 2
2 × 3 × 5 =
60
prime factor =
211
prime factor =
317
composite factor = 2 × 211 =
422
composite factor = 3 × 211 =
633
composite factor = 2 × 317 =
634
composite factor = 2
2 × 211 =
844
composite factor = 3 × 317 =
951
composite factor = 5 × 211 =
1,055
composite factor = 2 × 3 × 211 =
1,266
composite factor = 2
2 × 317 =
1,268
composite factor = 5 × 317 =
1,585
composite factor = 2 × 3 × 317 =
1,902
This list continues below...
... This list continues from above
composite factor = 2 × 5 × 211 =
2,110
composite factor = 2
2 × 3 × 211 =
2,532
composite factor = 3 × 5 × 211 =
3,165
composite factor = 2 × 5 × 317 =
3,170
composite factor = 2
2 × 3 × 317 =
3,804
composite factor = 2
2 × 5 × 211 =
4,220
composite factor = 3 × 5 × 317 =
4,755
composite factor = 2 × 3 × 5 × 211 =
6,330
composite factor = 2
2 × 5 × 317 =
6,340
composite factor = 2 × 3 × 5 × 317 =
9,510
composite factor = 2
2 × 3 × 5 × 211 =
12,660
composite factor = 2
2 × 3 × 5 × 317 =
19,020
composite factor = 211 × 317 =
66,887
composite factor = 2 × 211 × 317 =
133,774
composite factor = 3 × 211 × 317 =
200,661
composite factor = 2
2 × 211 × 317 =
267,548
composite factor = 5 × 211 × 317 =
334,435
composite factor = 2 × 3 × 211 × 317 =
401,322
composite factor = 2 × 5 × 211 × 317 =
668,870
composite factor = 2
2 × 3 × 211 × 317 =
802,644
composite factor = 3 × 5 × 211 × 317 =
1,003,305
composite factor = 2
2 × 5 × 211 × 317 =
1,337,740
composite factor = 2 × 3 × 5 × 211 × 317 =
2,006,610
composite factor = 2
2 × 3 × 5 × 211 × 317 =
4,013,220
48 factors (divisors)
What times what is 4,013,220?
What number multiplied by what number equals 4,013,220?
All the combinations of any two natural numbers whose product equals 4,013,220.
1 × 4,013,220 = 4,013,220
2 × 2,006,610 = 4,013,220
3 × 1,337,740 = 4,013,220
4 × 1,003,305 = 4,013,220
5 × 802,644 = 4,013,220
6 × 668,870 = 4,013,220
10 × 401,322 = 4,013,220
12 × 334,435 = 4,013,220
15 × 267,548 = 4,013,220
20 × 200,661 = 4,013,220
30 × 133,774 = 4,013,220
60 × 66,887 = 4,013,220
211 × 19,020 = 4,013,220
317 × 12,660 = 4,013,220
422 × 9,510 = 4,013,220
633 × 6,340 = 4,013,220
634 × 6,330 = 4,013,220
844 × 4,755 = 4,013,220
951 × 4,220 = 4,013,220
1,055 × 3,804 = 4,013,220
1,266 × 3,170 = 4,013,220
1,268 × 3,165 = 4,013,220
1,585 × 2,532 = 4,013,220
1,902 × 2,110 = 4,013,220
24 unique multiplications The final answer:
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