20520720

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{2591}}^1$

素因数の和:2621

約数の個数: 120

約数和(自身を含む): 75209472

約数和(自身を除く): 54688752

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 16, 18, 20, 22, 24, 30, 33, 36, 40, 44, 45, 48, 55, 60, 66, 72, 80, 88, 90, 99, 110, 120, 132, 144, 165, 176, 180, 198, 220, 240, 264, 330, 360, 396, 440, 495, 528, 660, 720, 792, 880, 990, 1320, 1584, 1980, 2591, 2640, 3960, 5182, 7773, 7920, 10364, 12955, 15546, 20728, 23319, 25910, 28501, 31092, 38865, 41456, 46638, 51820, 57002, 62184, 77730, 85503, 93276, 103640, 114004, 116595, 124368, 142505, 155460, 171006, 186552, 207280, 228008, 233190, 256509, 285010, 310920, 342012, 373104, 427515, 456016, 466380, 513018, 570020, 621840, 684024, 855030, 932760, 1026036, 1140040, 1282545, 1368048, 1710060, 1865520, 2052072, 2280080, 2565090, 3420120, 4104144, 5130180, 6840240, 10260360, 20520720]

約数ペア:

[(1, 20520720), (2, 10260360), (3, 6840240), (4, 5130180), (5, 4104144), (6, 3420120), (8, 2565090), (9, 2280080), (10, 2052072), (11, 1865520), (12, 1710060), (15, 1368048), (16, 1282545), (18, 1140040), (20, 1026036), (22, 932760), (24, 855030), (30, 684024), (33, 621840), (36, 570020), (40, 513018), (44, 466380), (45, 456016), (48, 427515), (55, 373104), (60, 342012), (66, 310920), (72, 285010), (80, 256509), (88, 233190), (90, 228008), (99, 207280), (110, 186552), (120, 171006), (132, 155460), (144, 142505), (165, 124368), (176, 116595), (180, 114004), (198, 103640), (220, 93276), (240, 85503), (264, 77730), (330, 62184), (360, 57002), (396, 51820), (440, 46638), (495, 41456), (528, 38865), (660, 31092), (720, 28501), (792, 25910), (880, 23319), (990, 20728), (1320, 15546), (1584, 12955), (1980, 10364), (2591, 7920), (2640, 7773), (3960, 5182)]