20975240

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{193}}^1$

素因数の和:247

約数の個数: 128

約数和(自身を含む): 58665600

約数和(自身を除く): 37690360

約数列:

[1, 2, 4, 5, 8, 10, 11, 13, 19, 20, 22, 26, 38, 40, 44, 52, 55, 65, 76, 88, 95, 104, 110, 130, 143, 152, 190, 193, 209, 220, 247, 260, 286, 380, 386, 418, 440, 494, 520, 572, 715, 760, 772, 836, 965, 988, 1045, 1144, 1235, 1430, 1544, 1672, 1930, 1976, 2090, 2123, 2470, 2509, 2717, 2860, 3667, 3860, 4180, 4246, 4940, 5018, 5434, 5720, 7334, 7720, 8360, 8492, 9880, 10036, 10615, 10868, 12545, 13585, 14668, 16984, 18335, 20072, 21230, 21736, 25090, 27170, 27599, 29336, 36670, 40337, 42460, 47671, 50180, 54340, 55198, 73340, 80674, 84920, 95342, 100360, 108680, 110396, 137995, 146680, 161348, 190684, 201685, 220792, 238355, 275990, 322696, 381368, 403370, 476710, 524381, 551980, 806740, 953420, 1048762, 1103960, 1613480, 1906840, 2097524, 2621905, 4195048, 5243810, 10487620, 20975240]

約数ペア:

[(1, 20975240), (2, 10487620), (4, 5243810), (5, 4195048), (8, 2621905), (10, 2097524), (11, 1906840), (13, 1613480), (19, 1103960), (20, 1048762), (22, 953420), (26, 806740), (38, 551980), (40, 524381), (44, 476710), (52, 403370), (55, 381368), (65, 322696), (76, 275990), (88, 238355), (95, 220792), (104, 201685), (110, 190684), (130, 161348), (143, 146680), (152, 137995), (190, 110396), (193, 108680), (209, 100360), (220, 95342), (247, 84920), (260, 80674), (286, 73340), (380, 55198), (386, 54340), (418, 50180), (440, 47671), (494, 42460), (520, 40337), (572, 36670), (715, 29336), (760, 27599), (772, 27170), (836, 25090), (965, 21736), (988, 21230), (1045, 20072), (1144, 18335), (1235, 16984), (1430, 14668), (1544, 13585), (1672, 12545), (1930, 10868), (1976, 10615), (2090, 10036), (2123, 9880), (2470, 8492), (2509, 8360), (2717, 7720), (2860, 7334), (3667, 5720), (3860, 5434), (4180, 5018), (4246, 4940)]