20123701840

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{509}}^1\times {\mathrm{44927}}^1$

素因数の和:45460

約数の個数: 80

約数和(自身を含む): 51142440960

約数和(自身を除く): 31018739120

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 509, 880, 1018, 2036, 2545, 4072, 5090, 5599, 8144, 10180, 11198, 20360, 22396, 27995, 40720, 44792, 44927, 55990, 89584, 89854, 111980, 179708, 223960, 224635, 359416, 447920, 449270, 494197, 718832, 898540, 988394, 1797080, 1976788, 2470985, 3594160, 3953576, 4941970, 7907152, 9883940, 19767880, 22867843, 39535760, 45735686, 91471372, 114339215, 182942744, 228678430, 251546273, 365885488, 457356860, 503092546, 914713720, 1006185092, 1257731365, 1829427440, 2012370184, 2515462730, 4024740368, 5030925460, 10061850920, 20123701840]

約数ペア:

[(1, 20123701840), (2, 10061850920), (4, 5030925460), (5, 4024740368), (8, 2515462730), (10, 2012370184), (11, 1829427440), (16, 1257731365), (20, 1006185092), (22, 914713720), (40, 503092546), (44, 457356860), (55, 365885488), (80, 251546273), (88, 228678430), (110, 182942744), (176, 114339215), (220, 91471372), (440, 45735686), (509, 39535760), (880, 22867843), (1018, 19767880), (2036, 9883940), (2545, 7907152), (4072, 4941970), (5090, 3953576), (5599, 3594160), (8144, 2470985), (10180, 1976788), (11198, 1797080), (20360, 988394), (22396, 898540), (27995, 718832), (40720, 494197), (44792, 449270), (44927, 447920), (55990, 359416), (89584, 224635), (89854, 223960), (111980, 179708)]