To find all the divisors of the number 701,920:
- 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 701,920:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
701,920 = 25 × 5 × 41 × 107
701,920 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 = (5 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 6 × 2 × 2 × 2 = 48
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 701,920
- 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
composite factor = 2
2 =
4
prime factor =
5
composite factor = 2
3 =
8
composite factor = 2 × 5 =
10
composite factor = 2
4 =
16
composite factor = 2
2 × 5 =
20
composite factor = 2
5 =
32
composite factor = 2
3 × 5 =
40
prime factor =
41
composite factor = 2
4 × 5 =
80
composite factor = 2 × 41 =
82
prime factor =
107
composite factor = 2
5 × 5 =
160
composite factor = 2
2 × 41 =
164
composite factor = 5 × 41 =
205
composite factor = 2 × 107 =
214
composite factor = 2
3 × 41 =
328
composite factor = 2 × 5 × 41 =
410
composite factor = 2
2 × 107 =
428
composite factor = 5 × 107 =
535
composite factor = 2
4 × 41 =
656
composite factor = 2
2 × 5 × 41 =
820
This list continues below...
... This list continues from above
composite factor = 2
3 × 107 =
856
composite factor = 2 × 5 × 107 =
1,070
composite factor = 2
5 × 41 =
1,312
composite factor = 2
3 × 5 × 41 =
1,640
composite factor = 2
4 × 107 =
1,712
composite factor = 2
2 × 5 × 107 =
2,140
composite factor = 2
4 × 5 × 41 =
3,280
composite factor = 2
5 × 107 =
3,424
composite factor = 2
3 × 5 × 107 =
4,280
composite factor = 41 × 107 =
4,387
composite factor = 2
5 × 5 × 41 =
6,560
composite factor = 2
4 × 5 × 107 =
8,560
composite factor = 2 × 41 × 107 =
8,774
composite factor = 2
5 × 5 × 107 =
17,120
composite factor = 2
2 × 41 × 107 =
17,548
composite factor = 5 × 41 × 107 =
21,935
composite factor = 2
3 × 41 × 107 =
35,096
composite factor = 2 × 5 × 41 × 107 =
43,870
composite factor = 2
4 × 41 × 107 =
70,192
composite factor = 2
2 × 5 × 41 × 107 =
87,740
composite factor = 2
5 × 41 × 107 =
140,384
composite factor = 2
3 × 5 × 41 × 107 =
175,480
composite factor = 2
4 × 5 × 41 × 107 =
350,960
composite factor = 2
5 × 5 × 41 × 107 =
701,920
48 factors (divisors)
What times what is 701,920?
What number multiplied by what number equals 701,920?
All the combinations of any two natural numbers whose product equals 701,920.
1 × 701,920 = 701,920
2 × 350,960 = 701,920
4 × 175,480 = 701,920
5 × 140,384 = 701,920
8 × 87,740 = 701,920
10 × 70,192 = 701,920
16 × 43,870 = 701,920
20 × 35,096 = 701,920
32 × 21,935 = 701,920
40 × 17,548 = 701,920
41 × 17,120 = 701,920
80 × 8,774 = 701,920
82 × 8,560 = 701,920
107 × 6,560 = 701,920
160 × 4,387 = 701,920
164 × 4,280 = 701,920
205 × 3,424 = 701,920
214 × 3,280 = 701,920
328 × 2,140 = 701,920
410 × 1,712 = 701,920
428 × 1,640 = 701,920
535 × 1,312 = 701,920
656 × 1,070 = 701,920
820 × 856 = 701,920
24 unique multiplications The final answer:
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