1,980,362

2 × 990181

Starting at 1,980,362, the Collatz iteration reaches 1 after 91 steps. The first transition is 990181; the starting value is even with 4 positive divisors.

Prime Factor Structure

Factorization String 2 × 990181

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 2,970,546

Proper Divisor Sum 990,184

Digit Sum / Digital Root 29 (Root: 2)

Adjacent Primes #1980361 ← → #1980367

Radix Representation

Decimal	1980362
Binary	111100011011111001010 (21 bits)
Octal	0o7433712
Hexadecimal	0x1E37CA

Divisor Catalog (4)

1 2 990,181 1,980,362

Collatz Trajectory (91 steps to reach 1)

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

1,980,362 990,181 2,970,544 1,485,272 742,636 371,318 185,659 556,978 278,489 835,468 417,734 208,867 626,602 313,301 939,904 469,952 234,976 117,488 58,744 29,372 14,686 7,343 22,030 11,015 33,046 16,523 49,570 24,785 74,356 37,178 18,589 55,768 27,884 13,942 6,971 20,914 10,457 31,372 15,686 7,843 23,530 11,765 35,296 17,648 8,824 4,412 2,206 1,103 3,310 1,655 4,966 2,483 7,450 3,725 11,176 5,588 2,794 1,397 4,192 2,096

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