To find all the divisors of the number 694,721,290:
- 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 694,721,290:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
694,721,290 = 2 × 5 × 73 × 173 × 5,501
694,721,290 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 = (1 + 1) × (1 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 2 × 2 × 2 × 2 × 2 = 32
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 694,721,290
- Multiply the prime factors involved in the prime factorization of the number in all their unique combinations, that give different results.
- 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 =
5
composite factor = 2 × 5 =
10
prime factor =
73
composite factor = 2 × 73 =
146
prime factor =
173
composite factor = 2 × 173 =
346
composite factor = 5 × 73 =
365
composite factor = 2 × 5 × 73 =
730
composite factor = 5 × 173 =
865
composite factor = 2 × 5 × 173 =
1,730
prime factor =
5,501
composite factor = 2 × 5,501 =
11,002
composite factor = 73 × 173 =
12,629
composite factor = 2 × 73 × 173 =
25,258
This list continues below...
... This list continues from above
composite factor = 5 × 5,501 =
27,505
composite factor = 2 × 5 × 5,501 =
55,010
composite factor = 5 × 73 × 173 =
63,145
composite factor = 2 × 5 × 73 × 173 =
126,290
composite factor = 73 × 5,501 =
401,573
composite factor = 2 × 73 × 5,501 =
803,146
composite factor = 173 × 5,501 =
951,673
composite factor = 2 × 173 × 5,501 =
1,903,346
composite factor = 5 × 73 × 5,501 =
2,007,865
composite factor = 2 × 5 × 73 × 5,501 =
4,015,730
composite factor = 5 × 173 × 5,501 =
4,758,365
composite factor = 2 × 5 × 173 × 5,501 =
9,516,730
composite factor = 73 × 173 × 5,501 =
69,472,129
composite factor = 2 × 73 × 173 × 5,501 =
138,944,258
composite factor = 5 × 73 × 173 × 5,501 =
347,360,645
composite factor = 2 × 5 × 73 × 173 × 5,501 =
694,721,290
32 factors (divisors)
What times what is 694,721,290?
What number multiplied by what number equals 694,721,290?
All the combinations of any two natural numbers whose product equals 694,721,290.
1 × 694,721,290 = 694,721,290
2 × 347,360,645 = 694,721,290
5 × 138,944,258 = 694,721,290
10 × 69,472,129 = 694,721,290
73 × 9,516,730 = 694,721,290
146 × 4,758,365 = 694,721,290
173 × 4,015,730 = 694,721,290
346 × 2,007,865 = 694,721,290
365 × 1,903,346 = 694,721,290
730 × 951,673 = 694,721,290
865 × 803,146 = 694,721,290
1,730 × 401,573 = 694,721,290
5,501 × 126,290 = 694,721,290
11,002 × 63,145 = 694,721,290
12,629 × 55,010 = 694,721,290
25,258 × 27,505 = 694,721,290
16 unique multiplications The final answer:
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