21350680

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{2161}}^1$

素因数の和:2204

約数の個数: 64

約数和(自身を含む): 54482400

約数和(自身を除く): 33131720

約数列:

[1, 2, 4, 5, 8, 10, 13, 19, 20, 26, 38, 40, 52, 65, 76, 95, 104, 130, 152, 190, 247, 260, 380, 494, 520, 760, 988, 1235, 1976, 2161, 2470, 4322, 4940, 8644, 9880, 10805, 17288, 21610, 28093, 41059, 43220, 56186, 82118, 86440, 112372, 140465, 164236, 205295, 224744, 280930, 328472, 410590, 533767, 561860, 821180, 1067534, 1123720, 1642360, 2135068, 2668835, 4270136, 5337670, 10675340, 21350680]

約数ペア:

[(1, 21350680), (2, 10675340), (4, 5337670), (5, 4270136), (8, 2668835), (10, 2135068), (13, 1642360), (19, 1123720), (20, 1067534), (26, 821180), (38, 561860), (40, 533767), (52, 410590), (65, 328472), (76, 280930), (95, 224744), (104, 205295), (130, 164236), (152, 140465), (190, 112372), (247, 86440), (260, 82118), (380, 56186), (494, 43220), (520, 41059), (760, 28093), (988, 21610), (1235, 17288), (1976, 10805), (2161, 9880), (2470, 8644), (4322, 4940)]