21,424,396

2² × 7 × 107 × 7151

21,424,396 factors as 2^2 × 7 × 107 × 7151. Its 24 positive divisors give a proper-divisor sum of 21,830,900, so this integer is abundant. The Collatz stopping time is 265 steps.

Prime Factor Structure

Factorization String 2^2 × 7 × 107 × 7151

Distinct Prime Factors 4

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 24

Divisor Sum (σ) 43,255,296

Proper Divisor Sum 21,830,900

Digit Sum / Digital Root 31 (Root: 4)

Adjacent Primes #21424391 ← → #21424397

Radix Representation

Decimal	21424396
Binary	1010001101110100100001100 (25 bits)
Octal	0o121564414
Hexadecimal	0x146E90C

Divisor Catalog (24)

Collatz Trajectory (265 steps to reach 1)

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

21,424,396 10,712,198 5,356,099 16,068,298 8,034,149 24,102,448 12,051,224 6,025,612 3,012,806 1,506,403 4,519,210 2,259,605 6,778,816 3,389,408 1,694,704 847,352 423,676 211,838 105,919 317,758 158,879 476,638 238,319 714,958 357,479 1,072,438 536,219 1,608,658 804,329 2,412,988 1,206,494 603,247 1,809,742 904,871 2,714,614 1,357,307 4,071,922 2,035,961 6,107,884 3,053,942 1,526,971 4,580,914 2,290,457 6,871,372 3,435,686 1,717,843 5,153,530 2,576,765 7,730,296 3,865,148 1,932,574 966,287 2,898,862 1,449,431 4,348,294 2,174,147 6,522,442 3,261,221 9,783,664 4,891,832

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