20505940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{593}}^1$

素因数の和:641

約数の個数: 96

約数和(自身を含む): 55883520

約数和(自身を除く): 35377580

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 19, 20, 26, 28, 35, 38, 52, 65, 70, 76, 91, 95, 130, 133, 140, 182, 190, 247, 260, 266, 364, 380, 455, 494, 532, 593, 665, 910, 988, 1186, 1235, 1330, 1729, 1820, 2372, 2470, 2660, 2965, 3458, 4151, 4940, 5930, 6916, 7709, 8302, 8645, 11267, 11860, 15418, 16604, 17290, 20755, 22534, 30836, 34580, 38545, 41510, 45068, 53963, 56335, 77090, 78869, 83020, 107926, 112670, 146471, 154180, 157738, 215852, 225340, 269815, 292942, 315476, 394345, 539630, 585884, 732355, 788690, 1025297, 1079260, 1464710, 1577380, 2050594, 2929420, 4101188, 5126485, 10252970, 20505940]

約数ペア:

[(1, 20505940), (2, 10252970), (4, 5126485), (5, 4101188), (7, 2929420), (10, 2050594), (13, 1577380), (14, 1464710), (19, 1079260), (20, 1025297), (26, 788690), (28, 732355), (35, 585884), (38, 539630), (52, 394345), (65, 315476), (70, 292942), (76, 269815), (91, 225340), (95, 215852), (130, 157738), (133, 154180), (140, 146471), (182, 112670), (190, 107926), (247, 83020), (260, 78869), (266, 77090), (364, 56335), (380, 53963), (455, 45068), (494, 41510), (532, 38545), (593, 34580), (665, 30836), (910, 22534), (988, 20755), (1186, 17290), (1235, 16604), (1330, 15418), (1729, 11860), (1820, 11267), (2372, 8645), (2470, 8302), (2660, 7709), (2965, 6916), (3458, 5930), (4151, 4940)]