21,102,425

5² × 661 × 1277

21,102,425 factors as 5^2 × 661 × 1277. Its 12 positive divisors give a proper-divisor sum of 5,124,691, so this integer is deficient. The Collatz stopping time is 190 steps.

Prime Factor Structure

Factorization String 5^2 × 661 × 1277

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 12

Divisor Sum (σ) 26,227,116

Proper Divisor Sum 5,124,691

Digit Sum / Digital Root 17 (Root: 8)

Adjacent Primes #21102421 ← → #21102439

Radix Representation

Decimal	21102425
Binary	1010000011111111101011001 (25 bits)
Octal	0o120377531
Hexadecimal	0x141FF59

Divisor Catalog (12)

1 5 25 661 1,277 3,305 6,385 16,525 31,925 844,097 4,220,485 21,102,425

Collatz Trajectory (190 steps to reach 1)

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

21,102,425 63,307,276 31,653,638 15,826,819 47,480,458 23,740,229 71,220,688 35,610,344 17,805,172 8,902,586 4,451,293 13,353,880 6,676,940 3,338,470 1,669,235 5,007,706 2,503,853 7,511,560 3,755,780 1,877,890 938,945 2,816,836 1,408,418 704,209 2,112,628 1,056,314 528,157 1,584,472 792,236 396,118 198,059 594,178 297,089 891,268 445,634 222,817 668,452 334,226 167,113 501,340 250,670 125,335 376,006 188,003 564,010 282,005 846,016 423,008 211,504 105,752 52,876 26,438 13,219 39,658 19,829 59,488 29,744 14,872 7,436 3,718

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