Integer Profile
21,255
3 × 5 × 13 × 109
Prime factors, divisor sums, positional representations and sequence properties for 21,255. The prime factorization is 3 × 5 × 13 × 109.
Number of positive divisors: 16. Showing the recorded part of the sequence: 149.
Prime factorization
- Factorization
- 3 × 5 × 13 × 109
- Distinct prime factors
- 4
- Perfect square
- No
- Parity
- Odd
Arithmetic properties
- Positive divisors
- 16
- Divisor sum
- 36,960
- Proper-divisor sum
- 15,705
- Digit sum
- 15
- Digital root
- 6
Number bases
- Decimal
- 21255
- Binary
- 101001100000111 (15 bits)
- Octal
- 0o51407
- Hexadecimal
- 0x5307
Divisor catalog (16)
135131539651091953275451,4171,6354,2517,08521,255
Showing 16 of 16.
Collatz trajectory (149 steps)
Even: n → n/2; Odd: n → 3n + 1
21,25563,76631,88395,65047,825143,47671,73835,869107,60853,80426,90213,45140,35420,17760,53230,26615,13345,40022,70011,3505,67517,0268,51325,54012,7706,38519,1569,5784,78914,3687,1843,5921,7968984491,3486743371,012506253760380190952861434302156463239704851,45672836418291274137
Showing 60 of 60.
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