169,720

2³ × 5 × 4243

Starting at 169,720, the Collatz iteration reaches 1 after 59 steps. The first transition is 84860; the starting value is even with 16 positive divisors.

Prime Factor Structure

Factorization String 2^3 × 5 × 4243

Distinct Prime Factors 3

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 381,960

Proper Divisor Sum 212,240

Digit Sum / Digital Root 25 (Root: 7)

Adjacent Primes #169709 ← → #169733

Radix Representation

Decimal	169720
Binary	101001011011111000 (18 bits)
Octal	0o513370
Hexadecimal	0x296F8

Divisor Catalog (16)

1 2 4 5 8 10 20 40 4,243 8,486 16,972 21,215 33,944 42,430 84,860 169,720

Collatz Trajectory (59 steps to reach 1)

Iterative sequence n → n/2 (if even) or 3n+1 (if odd):

169,720 84,860 42,430 21,215 63,646 31,823 95,470 47,735 143,206 71,603 214,810 107,405 322,216 161,108 80,554 40,277 120,832 60,416 30,208 15,104 7,552 3,776 1,888 944 472 236 118 59 178 89 268 134 67 202 101 304 152 76 38 19 58 29 88 44 22 11 34 17 52 26 13 40 20 10 5 16 8 4 2 1

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