To find all the divisors of the number 4,620,140:
- 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 4,620,140:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
4,620,140 = 22 × 5 × 7 × 61 × 541
4,620,140 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 4,620,140
- 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 × 5 =
10
composite factor = 2 × 7 =
14
composite factor = 2
2 × 5 =
20
composite factor = 2
2 × 7 =
28
composite factor = 5 × 7 =
35
prime factor =
61
composite factor = 2 × 5 × 7 =
70
composite factor = 2 × 61 =
122
composite factor = 2
2 × 5 × 7 =
140
composite factor = 2
2 × 61 =
244
composite factor = 5 × 61 =
305
composite factor = 7 × 61 =
427
prime factor =
541
composite factor = 2 × 5 × 61 =
610
composite factor = 2 × 7 × 61 =
854
composite factor = 2 × 541 =
1,082
composite factor = 2
2 × 5 × 61 =
1,220
composite factor = 2
2 × 7 × 61 =
1,708
composite factor = 5 × 7 × 61 =
2,135
This list continues below...
... This list continues from above
composite factor = 2
2 × 541 =
2,164
composite factor = 5 × 541 =
2,705
composite factor = 7 × 541 =
3,787
composite factor = 2 × 5 × 7 × 61 =
4,270
composite factor = 2 × 5 × 541 =
5,410
composite factor = 2 × 7 × 541 =
7,574
composite factor = 2
2 × 5 × 7 × 61 =
8,540
composite factor = 2
2 × 5 × 541 =
10,820
composite factor = 2
2 × 7 × 541 =
15,148
composite factor = 5 × 7 × 541 =
18,935
composite factor = 61 × 541 =
33,001
composite factor = 2 × 5 × 7 × 541 =
37,870
composite factor = 2 × 61 × 541 =
66,002
composite factor = 2
2 × 5 × 7 × 541 =
75,740
composite factor = 2
2 × 61 × 541 =
132,004
composite factor = 5 × 61 × 541 =
165,005
composite factor = 7 × 61 × 541 =
231,007
composite factor = 2 × 5 × 61 × 541 =
330,010
composite factor = 2 × 7 × 61 × 541 =
462,014
composite factor = 2
2 × 5 × 61 × 541 =
660,020
composite factor = 2
2 × 7 × 61 × 541 =
924,028
composite factor = 5 × 7 × 61 × 541 =
1,155,035
composite factor = 2 × 5 × 7 × 61 × 541 =
2,310,070
composite factor = 2
2 × 5 × 7 × 61 × 541 =
4,620,140
48 factors (divisors)
What times what is 4,620,140?
What number multiplied by what number equals 4,620,140?
All the combinations of any two natural numbers whose product equals 4,620,140.
1 × 4,620,140 = 4,620,140
2 × 2,310,070 = 4,620,140
4 × 1,155,035 = 4,620,140
5 × 924,028 = 4,620,140
7 × 660,020 = 4,620,140
10 × 462,014 = 4,620,140
14 × 330,010 = 4,620,140
20 × 231,007 = 4,620,140
28 × 165,005 = 4,620,140
35 × 132,004 = 4,620,140
61 × 75,740 = 4,620,140
70 × 66,002 = 4,620,140
122 × 37,870 = 4,620,140
140 × 33,001 = 4,620,140
244 × 18,935 = 4,620,140
305 × 15,148 = 4,620,140
427 × 10,820 = 4,620,140
541 × 8,540 = 4,620,140
610 × 7,574 = 4,620,140
854 × 5,410 = 4,620,140
1,082 × 4,270 = 4,620,140
1,220 × 3,787 = 4,620,140
1,708 × 2,705 = 4,620,140
2,135 × 2,164 = 4,620,140
24 unique multiplications The final answer:
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