20993960

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{859}}^1$

素因数の和:930

約数の個数: 64

約数和(自身を含む): 52012800

約数和(自身を除く): 31018840

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 47, 52, 65, 94, 104, 130, 188, 235, 260, 376, 470, 520, 611, 859, 940, 1222, 1718, 1880, 2444, 3055, 3436, 4295, 4888, 6110, 6872, 8590, 11167, 12220, 17180, 22334, 24440, 34360, 40373, 44668, 55835, 80746, 89336, 111670, 161492, 201865, 223340, 322984, 403730, 446680, 524849, 807460, 1049698, 1614920, 2099396, 2624245, 4198792, 5248490, 10496980, 20993960]

約数ペア:

[(1, 20993960), (2, 10496980), (4, 5248490), (5, 4198792), (8, 2624245), (10, 2099396), (13, 1614920), (20, 1049698), (26, 807460), (40, 524849), (47, 446680), (52, 403730), (65, 322984), (94, 223340), (104, 201865), (130, 161492), (188, 111670), (235, 89336), (260, 80746), (376, 55835), (470, 44668), (520, 40373), (611, 34360), (859, 24440), (940, 22334), (1222, 17180), (1718, 12220), (1880, 11167), (2444, 8590), (3055, 6872), (3436, 6110), (4295, 4888)]