20865988

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{36479}}^1$

素因数の和:36507

約数の個数: 24

約数和(自身を含む): 42900480

約数和(自身を除く): 22034492

約数列:

[1, 2, 4, 11, 13, 22, 26, 44, 52, 143, 286, 572, 36479, 72958, 145916, 401269, 474227, 802538, 948454, 1605076, 1896908, 5216497, 10432994, 20865988]

約数ペア:

[(1, 20865988), (2, 10432994), (4, 5216497), (11, 1896908), (13, 1605076), (22, 948454), (26, 802538), (44, 474227), (52, 401269), (143, 145916), (286, 72958), (572, 36479)]