1,621,220

2² × 5 × 103 × 787

1,621,220 factors as 2^2 × 5 × 103 × 787. Its 24 positive divisors give a proper-divisor sum of 1,820,764, so this integer is abundant. The Collatz stopping time is 62 steps.

Prime Factor Structure

Factorization String 2^2 × 5 × 103 × 787

Distinct Prime Factors 4

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 24

Divisor Sum (σ) 3,441,984

Proper Divisor Sum 1,820,764

Digit Sum / Digital Root 14 (Root: 5)

Adjacent Primes #1621219 ← → #1621231

Radix Representation

Decimal	1621220
Binary	110001011110011100100 (21 bits)
Octal	0o6136344
Hexadecimal	0x18BCE4

Divisor Catalog (24)

Collatz Trajectory (62 steps to reach 1)

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

1,621,220 810,610 405,305 1,215,916 607,958 303,979 911,938 455,969 1,367,908 683,954 341,977 1,025,932 512,966 256,483 769,450 384,725 1,154,176 577,088 288,544 144,272 72,136 36,068 18,034 9,017 27,052 13,526 6,763 20,290 10,145 30,436 15,218 7,609 22,828 11,414 5,707 17,122 8,561 25,684 12,842 6,421 19,264 9,632 4,816 2,408 1,204 602 301 904 452 226 113 340 170 85 256 128 64 32 16 8

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