21,031,275

3 × 5² × 61 × 4597

21,031,275 factors as 3 × 5^2 × 61 × 4597. Its 24 positive divisors give a proper-divisor sum of 14,318,149, so this integer is deficient. The Collatz stopping time is 151 steps.

Prime Factor Structure

Factorization String 3 × 5^2 × 61 × 4597

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 24

Divisor Sum (σ) 35,349,424

Proper Divisor Sum 14,318,149

Digit Sum / Digital Root 21 (Root: 3)

Adjacent Primes #21031253 ← → #21031277

Radix Representation

Decimal	21031275
Binary	1010000001110100101101011 (25 bits)
Octal	0o120164553
Hexadecimal	0x140E96B

Divisor Catalog (24)

Collatz Trajectory (151 steps to reach 1)

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

21,031,275 63,093,826 31,546,913 94,640,740 47,320,370 23,660,185 70,980,556 35,490,278 17,745,139 53,235,418 26,617,709 79,853,128 39,926,564 19,963,282 9,981,641 29,944,924 14,972,462 7,486,231 22,458,694 11,229,347 33,688,042 16,844,021 50,532,064 25,266,032 12,633,016 6,316,508 3,158,254 1,579,127 4,737,382 2,368,691 7,106,074 3,553,037 10,659,112 5,329,556 2,664,778 1,332,389 3,997,168 1,998,584 999,292 499,646 249,823 749,470 374,735 1,124,206 562,103 1,686,310 843,155 2,529,466 1,264,733 3,794,200 1,897,100 948,550 474,275 1,422,826 711,413 2,134,240 1,067,120 533,560 266,780 133,390

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