Integer Profile
21,509
137 × 157
Prime factors, divisor sums, positional representations and sequence properties for 21,509. The prime factorization is 137 × 157.
Number of positive divisors: 4. Showing the recorded part of the sequence: 74.
Number bases
- Decimal
- 21509
- Binary
- 101010000000101 (15 bits)
- Octal
- 0o52005
- Hexadecimal
- 0x5405
Divisor catalog (4)
113715721,509
Showing 4 of 4.
Collatz trajectory (74 steps)
Even: n → n/2; Odd: n → 3n + 1
21,50964,52832,26416,1328,0664,03312,1006,0503,0259,0764,5382,2696,8083,4041,7028512,5541,2773,8321,9169584791,4387192,1581,0793,2381,6194,8582,4297,2883,6441,8229112,7341,3674,1022,0516,1543,0779,2324,6162,3081,1545771,7328664331,30065032597648824412261184924623
Showing 60 of 60.
Prime factorization
- Factorization
- 137 × 157
- Distinct prime factors
- 2
- Perfect square
- No
- Parity
- Odd
Arithmetic properties
- Positive divisors
- 4
- Divisor sum
- 21,804
- Proper-divisor sum
- 295
- Digit sum
- 17
- Digital root
- 8
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