18809780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{193}}^1\times {\mathrm{443}}^1$

素因数の和:656

約数の個数: 48

約数和(自身を含む): 43412544

約数和(自身を除く): 24602764

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 193, 220, 386, 443, 772, 886, 965, 1772, 1930, 2123, 2215, 3860, 4246, 4430, 4873, 8492, 8860, 9746, 10615, 19492, 21230, 24365, 42460, 48730, 85499, 97460, 170998, 341996, 427495, 854990, 940489, 1709980, 1880978, 3761956, 4702445, 9404890, 18809780]

約数ペア:

[(1, 18809780), (2, 9404890), (4, 4702445), (5, 3761956), (10, 1880978), (11, 1709980), (20, 940489), (22, 854990), (44, 427495), (55, 341996), (110, 170998), (193, 97460), (220, 85499), (386, 48730), (443, 42460), (772, 24365), (886, 21230), (965, 19492), (1772, 10615), (1930, 9746), (2123, 8860), (2215, 8492), (3860, 4873), (4246, 4430)]