20992660

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{263}}^1\times {\mathrm{307}}^1$

素因数の和:592

約数の個数: 48

約数和(自身を含む): 47811456

約数和(自身を除く): 26818796

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 263, 307, 526, 614, 1052, 1228, 1315, 1535, 2630, 3070, 3419, 3991, 5260, 6140, 6838, 7982, 13676, 15964, 17095, 19955, 34190, 39910, 68380, 79820, 80741, 161482, 322964, 403705, 807410, 1049633, 1614820, 2099266, 4198532, 5248165, 10496330, 20992660]

約数ペア:

[(1, 20992660), (2, 10496330), (4, 5248165), (5, 4198532), (10, 2099266), (13, 1614820), (20, 1049633), (26, 807410), (52, 403705), (65, 322964), (130, 161482), (260, 80741), (263, 79820), (307, 68380), (526, 39910), (614, 34190), (1052, 19955), (1228, 17095), (1315, 15964), (1535, 13676), (2630, 7982), (3070, 6838), (3419, 6140), (3991, 5260)]