To find all the divisors of the number 9,421,020:
- 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 9,421,020:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
9,421,020 = 22 × 32 × 5 × 7 × 7,477
9,421,020 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) × (2 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 3 × 3 × 2 × 2 × 2 = 72
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 9,421,020
- 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
prime factor =
7
composite factor = 3
2 =
9
composite factor = 2 × 5 =
10
composite factor = 2
2 × 3 =
12
composite factor = 2 × 7 =
14
composite factor = 3 × 5 =
15
composite factor = 2 × 3
2 =
18
composite factor = 2
2 × 5 =
20
composite factor = 3 × 7 =
21
composite factor = 2
2 × 7 =
28
composite factor = 2 × 3 × 5 =
30
composite factor = 5 × 7 =
35
composite factor = 2
2 × 3
2 =
36
composite factor = 2 × 3 × 7 =
42
composite factor = 3
2 × 5 =
45
composite factor = 2
2 × 3 × 5 =
60
composite factor = 3
2 × 7 =
63
composite factor = 2 × 5 × 7 =
70
composite factor = 2
2 × 3 × 7 =
84
composite factor = 2 × 3
2 × 5 =
90
composite factor = 3 × 5 × 7 =
105
composite factor = 2 × 3
2 × 7 =
126
composite factor = 2
2 × 5 × 7 =
140
composite factor = 2
2 × 3
2 × 5 =
180
composite factor = 2 × 3 × 5 × 7 =
210
composite factor = 2
2 × 3
2 × 7 =
252
composite factor = 3
2 × 5 × 7 =
315
composite factor = 2
2 × 3 × 5 × 7 =
420
composite factor = 2 × 3
2 × 5 × 7 =
630
composite factor = 2
2 × 3
2 × 5 × 7 =
1,260
This list continues below...
... This list continues from above
prime factor =
7,477
composite factor = 2 × 7,477 =
14,954
composite factor = 3 × 7,477 =
22,431
composite factor = 2
2 × 7,477 =
29,908
composite factor = 5 × 7,477 =
37,385
composite factor = 2 × 3 × 7,477 =
44,862
composite factor = 7 × 7,477 =
52,339
composite factor = 3
2 × 7,477 =
67,293
composite factor = 2 × 5 × 7,477 =
74,770
composite factor = 2
2 × 3 × 7,477 =
89,724
composite factor = 2 × 7 × 7,477 =
104,678
composite factor = 3 × 5 × 7,477 =
112,155
composite factor = 2 × 3
2 × 7,477 =
134,586
composite factor = 2
2 × 5 × 7,477 =
149,540
composite factor = 3 × 7 × 7,477 =
157,017
composite factor = 2
2 × 7 × 7,477 =
209,356
composite factor = 2 × 3 × 5 × 7,477 =
224,310
composite factor = 5 × 7 × 7,477 =
261,695
composite factor = 2
2 × 3
2 × 7,477 =
269,172
composite factor = 2 × 3 × 7 × 7,477 =
314,034
composite factor = 3
2 × 5 × 7,477 =
336,465
composite factor = 2
2 × 3 × 5 × 7,477 =
448,620
composite factor = 3
2 × 7 × 7,477 =
471,051
composite factor = 2 × 5 × 7 × 7,477 =
523,390
composite factor = 2
2 × 3 × 7 × 7,477 =
628,068
composite factor = 2 × 3
2 × 5 × 7,477 =
672,930
composite factor = 3 × 5 × 7 × 7,477 =
785,085
composite factor = 2 × 3
2 × 7 × 7,477 =
942,102
composite factor = 2
2 × 5 × 7 × 7,477 =
1,046,780
composite factor = 2
2 × 3
2 × 5 × 7,477 =
1,345,860
composite factor = 2 × 3 × 5 × 7 × 7,477 =
1,570,170
composite factor = 2
2 × 3
2 × 7 × 7,477 =
1,884,204
composite factor = 3
2 × 5 × 7 × 7,477 =
2,355,255
composite factor = 2
2 × 3 × 5 × 7 × 7,477 =
3,140,340
composite factor = 2 × 3
2 × 5 × 7 × 7,477 =
4,710,510
composite factor = 2
2 × 3
2 × 5 × 7 × 7,477 =
9,421,020
72 factors (divisors)
What times what is 9,421,020?
What number multiplied by what number equals 9,421,020?
All the combinations of any two natural numbers whose product equals 9,421,020.
1 × 9,421,020 = 9,421,020
2 × 4,710,510 = 9,421,020
3 × 3,140,340 = 9,421,020
4 × 2,355,255 = 9,421,020
5 × 1,884,204 = 9,421,020
6 × 1,570,170 = 9,421,020
7 × 1,345,860 = 9,421,020
9 × 1,046,780 = 9,421,020
10 × 942,102 = 9,421,020
12 × 785,085 = 9,421,020
14 × 672,930 = 9,421,020
15 × 628,068 = 9,421,020
18 × 523,390 = 9,421,020
20 × 471,051 = 9,421,020
21 × 448,620 = 9,421,020
28 × 336,465 = 9,421,020
30 × 314,034 = 9,421,020
35 × 269,172 = 9,421,020
36 × 261,695 = 9,421,020
42 × 224,310 = 9,421,020
45 × 209,356 = 9,421,020
60 × 157,017 = 9,421,020
63 × 149,540 = 9,421,020
70 × 134,586 = 9,421,020
84 × 112,155 = 9,421,020
90 × 104,678 = 9,421,020
105 × 89,724 = 9,421,020
126 × 74,770 = 9,421,020
140 × 67,293 = 9,421,020
180 × 52,339 = 9,421,020
210 × 44,862 = 9,421,020
252 × 37,385 = 9,421,020
315 × 29,908 = 9,421,020
420 × 22,431 = 9,421,020
630 × 14,954 = 9,421,020
1,260 × 7,477 = 9,421,020
36 unique multiplications The final answer:
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