To find all the divisors of the number 1,000,000,920:
- 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 1,000,000,920:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
1,000,000,920 = 23 × 3 × 5 × 71 × 117,371
1,000,000,920 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 = (3 + 1) × (1 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 4 × 2 × 2 × 2 × 2 = 64
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 1,000,000,920
- 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
3 =
8
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 × 3 =
24
composite factor = 2 × 3 × 5 =
30
composite factor = 2
3 × 5 =
40
composite factor = 2
2 × 3 × 5 =
60
prime factor =
71
composite factor = 2
3 × 3 × 5 =
120
composite factor = 2 × 71 =
142
composite factor = 3 × 71 =
213
composite factor = 2
2 × 71 =
284
composite factor = 5 × 71 =
355
composite factor = 2 × 3 × 71 =
426
composite factor = 2
3 × 71 =
568
composite factor = 2 × 5 × 71 =
710
composite factor = 2
2 × 3 × 71 =
852
composite factor = 3 × 5 × 71 =
1,065
composite factor = 2
2 × 5 × 71 =
1,420
composite factor = 2
3 × 3 × 71 =
1,704
composite factor = 2 × 3 × 5 × 71 =
2,130
composite factor = 2
3 × 5 × 71 =
2,840
composite factor = 2
2 × 3 × 5 × 71 =
4,260
composite factor = 2
3 × 3 × 5 × 71 =
8,520
This list continues below...
... This list continues from above
prime factor =
117,371
composite factor = 2 × 117,371 =
234,742
composite factor = 3 × 117,371 =
352,113
composite factor = 2
2 × 117,371 =
469,484
composite factor = 5 × 117,371 =
586,855
composite factor = 2 × 3 × 117,371 =
704,226
composite factor = 2
3 × 117,371 =
938,968
composite factor = 2 × 5 × 117,371 =
1,173,710
composite factor = 2
2 × 3 × 117,371 =
1,408,452
composite factor = 3 × 5 × 117,371 =
1,760,565
composite factor = 2
2 × 5 × 117,371 =
2,347,420
composite factor = 2
3 × 3 × 117,371 =
2,816,904
composite factor = 2 × 3 × 5 × 117,371 =
3,521,130
composite factor = 2
3 × 5 × 117,371 =
4,694,840
composite factor = 2
2 × 3 × 5 × 117,371 =
7,042,260
composite factor = 71 × 117,371 =
8,333,341
composite factor = 2
3 × 3 × 5 × 117,371 =
14,084,520
composite factor = 2 × 71 × 117,371 =
16,666,682
composite factor = 3 × 71 × 117,371 =
25,000,023
composite factor = 2
2 × 71 × 117,371 =
33,333,364
composite factor = 5 × 71 × 117,371 =
41,666,705
composite factor = 2 × 3 × 71 × 117,371 =
50,000,046
composite factor = 2
3 × 71 × 117,371 =
66,666,728
composite factor = 2 × 5 × 71 × 117,371 =
83,333,410
composite factor = 2
2 × 3 × 71 × 117,371 =
100,000,092
composite factor = 3 × 5 × 71 × 117,371 =
125,000,115
composite factor = 2
2 × 5 × 71 × 117,371 =
166,666,820
composite factor = 2
3 × 3 × 71 × 117,371 =
200,000,184
composite factor = 2 × 3 × 5 × 71 × 117,371 =
250,000,230
composite factor = 2
3 × 5 × 71 × 117,371 =
333,333,640
composite factor = 2
2 × 3 × 5 × 71 × 117,371 =
500,000,460
composite factor = 2
3 × 3 × 5 × 71 × 117,371 =
1,000,000,920
64 factors (divisors)
What times what is 1,000,000,920?
What number multiplied by what number equals 1,000,000,920?
All the combinations of any two natural numbers whose product equals 1,000,000,920.
1 × 1,000,000,920 = 1,000,000,920
2 × 500,000,460 = 1,000,000,920
3 × 333,333,640 = 1,000,000,920
4 × 250,000,230 = 1,000,000,920
5 × 200,000,184 = 1,000,000,920
6 × 166,666,820 = 1,000,000,920
8 × 125,000,115 = 1,000,000,920
10 × 100,000,092 = 1,000,000,920
12 × 83,333,410 = 1,000,000,920
15 × 66,666,728 = 1,000,000,920
20 × 50,000,046 = 1,000,000,920
24 × 41,666,705 = 1,000,000,920
30 × 33,333,364 = 1,000,000,920
40 × 25,000,023 = 1,000,000,920
60 × 16,666,682 = 1,000,000,920
71 × 14,084,520 = 1,000,000,920
120 × 8,333,341 = 1,000,000,920
142 × 7,042,260 = 1,000,000,920
213 × 4,694,840 = 1,000,000,920
284 × 3,521,130 = 1,000,000,920
355 × 2,816,904 = 1,000,000,920
426 × 2,347,420 = 1,000,000,920
568 × 1,760,565 = 1,000,000,920
710 × 1,408,452 = 1,000,000,920
852 × 1,173,710 = 1,000,000,920
1,065 × 938,968 = 1,000,000,920
1,420 × 704,226 = 1,000,000,920
1,704 × 586,855 = 1,000,000,920
2,130 × 469,484 = 1,000,000,920
2,840 × 352,113 = 1,000,000,920
4,260 × 234,742 = 1,000,000,920
8,520 × 117,371 = 1,000,000,920
32 unique multiplications The final answer:
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