1,990,173

3 × 17 × 39023

Starting at 1,990,173, the Collatz iteration reaches 1 after 215 steps. The first transition is 5970520; the starting value is odd with 8 positive divisors.

Prime Factor Structure

Factorization String 3 × 17 × 39023

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 8

Divisor Sum (σ) 2,809,728

Proper Divisor Sum 819,555

Digit Sum / Digital Root 30 (Root: 3)

Adjacent Primes #1990171 ← → #1990187

Radix Representation

Decimal	1990173
Binary	111100101111000011101 (21 bits)
Octal	0o7457035
Hexadecimal	0x1E5E1D

Divisor Catalog (8)

1 3 17 51 39,023 117,069 663,391 1,990,173

Collatz Trajectory (215 steps to reach 1)

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

1,990,173 5,970,520 2,985,260 1,492,630 746,315 2,238,946 1,119,473 3,358,420 1,679,210 839,605 2,518,816 1,259,408 629,704 314,852 157,426 78,713 236,140 118,070 59,035 177,106 88,553 265,660 132,830 66,415 199,246 99,623 298,870 149,435 448,306 224,153 672,460 336,230 168,115 504,346 252,173 756,520 378,260 189,130 94,565 283,696 141,848 70,924 35,462 17,731 53,194 26,597 79,792 39,896 19,948 9,974 4,987 14,962 7,481 22,444 11,222 5,611 16,834 8,417 25,252 12,626

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