To find all the divisors of the number 984,340:
- 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 984,340:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
984,340 = 22 × 5 × 7 × 79 × 89
984,340 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 984,340
- 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
composite factor = 2 × 5 × 7 =
70
prime factor =
79
prime factor =
89
composite factor = 2
2 × 5 × 7 =
140
composite factor = 2 × 79 =
158
composite factor = 2 × 89 =
178
composite factor = 2
2 × 79 =
316
composite factor = 2
2 × 89 =
356
composite factor = 5 × 79 =
395
composite factor = 5 × 89 =
445
composite factor = 7 × 79 =
553
composite factor = 7 × 89 =
623
composite factor = 2 × 5 × 79 =
790
composite factor = 2 × 5 × 89 =
890
This list continues below...
... This list continues from above
composite factor = 2 × 7 × 79 =
1,106
composite factor = 2 × 7 × 89 =
1,246
composite factor = 2
2 × 5 × 79 =
1,580
composite factor = 2
2 × 5 × 89 =
1,780
composite factor = 2
2 × 7 × 79 =
2,212
composite factor = 2
2 × 7 × 89 =
2,492
composite factor = 5 × 7 × 79 =
2,765
composite factor = 5 × 7 × 89 =
3,115
composite factor = 2 × 5 × 7 × 79 =
5,530
composite factor = 2 × 5 × 7 × 89 =
6,230
composite factor = 79 × 89 =
7,031
composite factor = 2
2 × 5 × 7 × 79 =
11,060
composite factor = 2
2 × 5 × 7 × 89 =
12,460
composite factor = 2 × 79 × 89 =
14,062
composite factor = 2
2 × 79 × 89 =
28,124
composite factor = 5 × 79 × 89 =
35,155
composite factor = 7 × 79 × 89 =
49,217
composite factor = 2 × 5 × 79 × 89 =
70,310
composite factor = 2 × 7 × 79 × 89 =
98,434
composite factor = 2
2 × 5 × 79 × 89 =
140,620
composite factor = 2
2 × 7 × 79 × 89 =
196,868
composite factor = 5 × 7 × 79 × 89 =
246,085
composite factor = 2 × 5 × 7 × 79 × 89 =
492,170
composite factor = 2
2 × 5 × 7 × 79 × 89 =
984,340
48 factors (divisors)
What times what is 984,340?
What number multiplied by what number equals 984,340?
All the combinations of any two natural numbers whose product equals 984,340.
1 × 984,340 = 984,340
2 × 492,170 = 984,340
4 × 246,085 = 984,340
5 × 196,868 = 984,340
7 × 140,620 = 984,340
10 × 98,434 = 984,340
14 × 70,310 = 984,340
20 × 49,217 = 984,340
28 × 35,155 = 984,340
35 × 28,124 = 984,340
70 × 14,062 = 984,340
79 × 12,460 = 984,340
89 × 11,060 = 984,340
140 × 7,031 = 984,340
158 × 6,230 = 984,340
178 × 5,530 = 984,340
316 × 3,115 = 984,340
356 × 2,765 = 984,340
395 × 2,492 = 984,340
445 × 2,212 = 984,340
553 × 1,780 = 984,340
623 × 1,580 = 984,340
790 × 1,246 = 984,340
890 × 1,106 = 984,340
24 unique multiplications The final answer:
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