To find all the divisors of the number 980,700:
- 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 980,700:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
980,700 = 22 × 3 × 52 × 7 × 467
980,700 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) × (2 + 1) × (1 + 1) × (1 + 1) = 3 × 2 × 3 × 2 × 2 = 72
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 980,700
- 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 = 2 × 5 =
10
composite factor = 2
2 × 3 =
12
composite factor = 2 × 7 =
14
composite factor = 3 × 5 =
15
composite factor = 2
2 × 5 =
20
composite factor = 3 × 7 =
21
composite factor = 5
2 =
25
composite factor = 2
2 × 7 =
28
composite factor = 2 × 3 × 5 =
30
composite factor = 5 × 7 =
35
composite factor = 2 × 3 × 7 =
42
composite factor = 2 × 5
2 =
50
composite factor = 2
2 × 3 × 5 =
60
composite factor = 2 × 5 × 7 =
70
composite factor = 3 × 5
2 =
75
composite factor = 2
2 × 3 × 7 =
84
composite factor = 2
2 × 5
2 =
100
composite factor = 3 × 5 × 7 =
105
composite factor = 2
2 × 5 × 7 =
140
composite factor = 2 × 3 × 5
2 =
150
composite factor = 5
2 × 7 =
175
composite factor = 2 × 3 × 5 × 7 =
210
composite factor = 2
2 × 3 × 5
2 =
300
composite factor = 2 × 5
2 × 7 =
350
composite factor = 2
2 × 3 × 5 × 7 =
420
prime factor =
467
composite factor = 3 × 5
2 × 7 =
525
composite factor = 2
2 × 5
2 × 7 =
700
composite factor = 2 × 467 =
934
This list continues below...
... This list continues from above
composite factor = 2 × 3 × 5
2 × 7 =
1,050
composite factor = 3 × 467 =
1,401
composite factor = 2
2 × 467 =
1,868
composite factor = 2
2 × 3 × 5
2 × 7 =
2,100
composite factor = 5 × 467 =
2,335
composite factor = 2 × 3 × 467 =
2,802
composite factor = 7 × 467 =
3,269
composite factor = 2 × 5 × 467 =
4,670
composite factor = 2
2 × 3 × 467 =
5,604
composite factor = 2 × 7 × 467 =
6,538
composite factor = 3 × 5 × 467 =
7,005
composite factor = 2
2 × 5 × 467 =
9,340
composite factor = 3 × 7 × 467 =
9,807
composite factor = 5
2 × 467 =
11,675
composite factor = 2
2 × 7 × 467 =
13,076
composite factor = 2 × 3 × 5 × 467 =
14,010
composite factor = 5 × 7 × 467 =
16,345
composite factor = 2 × 3 × 7 × 467 =
19,614
composite factor = 2 × 5
2 × 467 =
23,350
composite factor = 2
2 × 3 × 5 × 467 =
28,020
composite factor = 2 × 5 × 7 × 467 =
32,690
composite factor = 3 × 5
2 × 467 =
35,025
composite factor = 2
2 × 3 × 7 × 467 =
39,228
composite factor = 2
2 × 5
2 × 467 =
46,700
composite factor = 3 × 5 × 7 × 467 =
49,035
composite factor = 2
2 × 5 × 7 × 467 =
65,380
composite factor = 2 × 3 × 5
2 × 467 =
70,050
composite factor = 5
2 × 7 × 467 =
81,725
composite factor = 2 × 3 × 5 × 7 × 467 =
98,070
composite factor = 2
2 × 3 × 5
2 × 467 =
140,100
composite factor = 2 × 5
2 × 7 × 467 =
163,450
composite factor = 2
2 × 3 × 5 × 7 × 467 =
196,140
composite factor = 3 × 5
2 × 7 × 467 =
245,175
composite factor = 2
2 × 5
2 × 7 × 467 =
326,900
composite factor = 2 × 3 × 5
2 × 7 × 467 =
490,350
composite factor = 2
2 × 3 × 5
2 × 7 × 467 =
980,700
72 factors (divisors)
What times what is 980,700?
What number multiplied by what number equals 980,700?
All the combinations of any two natural numbers whose product equals 980,700.
1 × 980,700 = 980,700
2 × 490,350 = 980,700
3 × 326,900 = 980,700
4 × 245,175 = 980,700
5 × 196,140 = 980,700
6 × 163,450 = 980,700
7 × 140,100 = 980,700
10 × 98,070 = 980,700
12 × 81,725 = 980,700
14 × 70,050 = 980,700
15 × 65,380 = 980,700
20 × 49,035 = 980,700
21 × 46,700 = 980,700
25 × 39,228 = 980,700
28 × 35,025 = 980,700
30 × 32,690 = 980,700
35 × 28,020 = 980,700
42 × 23,350 = 980,700
50 × 19,614 = 980,700
60 × 16,345 = 980,700
70 × 14,010 = 980,700
75 × 13,076 = 980,700
84 × 11,675 = 980,700
100 × 9,807 = 980,700
105 × 9,340 = 980,700
140 × 7,005 = 980,700
150 × 6,538 = 980,700
175 × 5,604 = 980,700
210 × 4,670 = 980,700
300 × 3,269 = 980,700
350 × 2,802 = 980,700
420 × 2,335 = 980,700
467 × 2,100 = 980,700
525 × 1,868 = 980,700
700 × 1,401 = 980,700
934 × 1,050 = 980,700
36 unique multiplications The final answer:
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