389840

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{443}}^1$

素因数の和:467

約数の個数: 40

約数和(自身を含む): 991008

約数和(自身を除く): 601168

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 443, 880, 886, 1772, 2215, 3544, 4430, 4873, 7088, 8860, 9746, 17720, 19492, 24365, 35440, 38984, 48730, 77968, 97460, 194920, 389840]

約数ペア:

[(1, 389840), (2, 194920), (4, 97460), (5, 77968), (8, 48730), (10, 38984), (11, 35440), (16, 24365), (20, 19492), (22, 17720), (40, 9746), (44, 8860), (55, 7088), (80, 4873), (88, 4430), (110, 3544), (176, 2215), (220, 1772), (440, 886), (443, 880)]