20742920

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47143}}^1$

素因数の和:47165

約数の個数: 32

約数和(自身を含む): 50915520

約数和(自身を除く): 30172600

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 47143, 94286, 188572, 235715, 377144, 471430, 518573, 942860, 1037146, 1885720, 2074292, 2592865, 4148584, 5185730, 10371460, 20742920]

約数ペア:

[(1, 20742920), (2, 10371460), (4, 5185730), (5, 4148584), (8, 2592865), (10, 2074292), (11, 1885720), (20, 1037146), (22, 942860), (40, 518573), (44, 471430), (55, 377144), (88, 235715), (110, 188572), (220, 94286), (440, 47143)]