20545560

素因数分解:

$2^3\times 3^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{263}}^1$

素因数の和:318

約数の個数: 192

約数和(自身を含む): 79073280

約数和(自身を除く): 58527720

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 18, 20, 21, 24, 28, 30, 31, 35, 36, 40, 42, 45, 56, 60, 62, 63, 70, 72, 84, 90, 93, 105, 120, 124, 126, 140, 155, 168, 180, 186, 210, 217, 248, 252, 263, 279, 280, 310, 315, 360, 372, 420, 434, 465, 504, 526, 558, 620, 630, 651, 744, 789, 840, 868, 930, 1052, 1085, 1116, 1240, 1260, 1302, 1315, 1395, 1578, 1736, 1841, 1860, 1953, 2104, 2170, 2232, 2367, 2520, 2604, 2630, 2790, 3156, 3255, 3682, 3720, 3906, 3945, 4340, 4734, 5208, 5260, 5523, 5580, 6312, 6510, 7364, 7812, 7890, 8153, 8680, 9205, 9468, 9765, 10520, 11046, 11160, 11835, 13020, 14728, 15624, 15780, 16306, 16569, 18410, 18936, 19530, 22092, 23670, 24459, 26040, 27615, 31560, 32612, 33138, 36820, 39060, 40765, 44184, 47340, 48918, 55230, 57071, 65224, 66276, 73377, 73640, 78120, 81530, 82845, 94680, 97836, 110460, 114142, 122295, 132552, 146754, 163060, 165690, 171213, 195672, 220920, 228284, 244590, 285355, 293508, 326120, 331380, 342426, 366885, 456568, 489180, 513639, 570710, 587016, 662760, 684852, 733770, 856065, 978360, 1027278, 1141420, 1369704, 1467540, 1712130, 2054556, 2282840, 2568195, 2935080, 3424260, 4109112, 5136390, 6848520, 10272780, 20545560]

約数ペア:

[(1, 20545560), (2, 10272780), (3, 6848520), (4, 5136390), (5, 4109112), (6, 3424260), (7, 2935080), (8, 2568195), (9, 2282840), (10, 2054556), (12, 1712130), (14, 1467540), (15, 1369704), (18, 1141420), (20, 1027278), (21, 978360), (24, 856065), (28, 733770), (30, 684852), (31, 662760), (35, 587016), (36, 570710), (40, 513639), (42, 489180), (45, 456568), (56, 366885), (60, 342426), (62, 331380), (63, 326120), (70, 293508), (72, 285355), (84, 244590), (90, 228284), (93, 220920), (105, 195672), (120, 171213), (124, 165690), (126, 163060), (140, 146754), (155, 132552), (168, 122295), (180, 114142), (186, 110460), (210, 97836), (217, 94680), (248, 82845), (252, 81530), (263, 78120), (279, 73640), (280, 73377), (310, 66276), (315, 65224), (360, 57071), (372, 55230), (420, 48918), (434, 47340), (465, 44184), (504, 40765), (526, 39060), (558, 36820), (620, 33138), (630, 32612), (651, 31560), (744, 27615), (789, 26040), (840, 24459), (868, 23670), (930, 22092), (1052, 19530), (1085, 18936), (1116, 18410), (1240, 16569), (1260, 16306), (1302, 15780), (1315, 15624), (1395, 14728), (1578, 13020), (1736, 11835), (1841, 11160), (1860, 11046), (1953, 10520), (2104, 9765), (2170, 9468), (2232, 9205), (2367, 8680), (2520, 8153), (2604, 7890), (2630, 7812), (2790, 7364), (3156, 6510), (3255, 6312), (3682, 5580), (3720, 5523), (3906, 5260), (3945, 5208), (4340, 4734)]