21,387,368

2³ × 337 × 7933

21,387,368 factors as 2^3 × 337 × 7933. Its 16 positive divisors give a proper-divisor sum of 18,838,012, so this integer is deficient. The Collatz stopping time is 120 steps.

Prime Factor Structure

Factorization String 2^3 × 337 × 7933

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 40,225,380

Proper Divisor Sum 18,838,012

Digit Sum / Digital Root 38 (Root: 2)

Adjacent Primes #21387361 ← → #21387389

Radix Representation

Decimal	21387368
Binary	1010001100101100001101000 (25 bits)
Octal	0o121454150
Hexadecimal	0x1465868

Divisor Catalog (16)

1 2 4 8 337 674 1,348 2,696 7,933 15,866 31,732 63,464 2,673,421 5,346,842 10,693,684 21,387,368

Collatz Trajectory (120 steps to reach 1)

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

21,387,368 10,693,684 5,346,842 2,673,421 8,020,264 4,010,132 2,005,066 1,002,533 3,007,600 1,503,800 751,900 375,950 187,975 563,926 281,963 845,890 422,945 1,268,836 634,418 317,209 951,628 475,814 237,907 713,722 356,861 1,070,584 535,292 267,646 133,823 401,470 200,735 602,206 301,103 903,310 451,655 1,354,966 677,483 2,032,450 1,016,225 3,048,676 1,524,338 762,169 2,286,508 1,143,254 571,627 1,714,882 857,441 2,572,324 1,286,162 643,081 1,929,244 964,622 482,311 1,446,934 723,467 2,170,402 1,085,201 3,255,604 1,627,802 813,901

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