20467440

素因数分解:

$2^4\times 3^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1$

素因数の和:188

約数の個数: 240

約数和(自身を含む): 81709056

約数和(自身を除く): 61241616

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 28, 30, 31, 35, 36, 40, 42, 45, 48, 56, 60, 62, 63, 70, 72, 80, 84, 90, 93, 105, 112, 120, 124, 126, 131, 140, 144, 155, 168, 180, 186, 210, 217, 240, 248, 252, 262, 279, 280, 310, 315, 336, 360, 372, 393, 420, 434, 465, 496, 504, 524, 558, 560, 620, 630, 651, 655, 720, 744, 786, 840, 868, 917, 930, 1008, 1048, 1085, 1116, 1179, 1240, 1260, 1302, 1310, 1395, 1488, 1572, 1680, 1736, 1834, 1860, 1953, 1965, 2096, 2170, 2232, 2358, 2480, 2520, 2604, 2620, 2751, 2790, 3144, 3255, 3472, 3668, 3720, 3906, 3930, 4061, 4340, 4464, 4585, 4716, 5040, 5208, 5240, 5502, 5580, 5895, 6288, 6510, 7336, 7440, 7812, 7860, 8122, 8253, 8680, 9170, 9432, 9765, 10416, 10480, 11004, 11160, 11790, 12183, 13020, 13755, 14672, 15624, 15720, 16244, 16506, 17360, 18340, 18864, 19530, 20305, 22008, 22320, 23580, 24366, 26040, 27510, 28427, 31248, 31440, 32488, 33012, 36549, 36680, 39060, 40610, 41265, 44016, 47160, 48732, 52080, 55020, 56854, 60915, 64976, 66024, 73098, 73360, 78120, 81220, 82530, 85281, 94320, 97464, 110040, 113708, 121830, 132048, 142135, 146196, 156240, 162440, 165060, 170562, 182745, 194928, 220080, 227416, 243660, 255843, 284270, 292392, 324880, 330120, 341124, 365490, 426405, 454832, 487320, 511686, 568540, 584784, 660240, 682248, 730980, 852810, 974640, 1023372, 1137080, 1279215, 1364496, 1461960, 1705620, 2046744, 2274160, 2558430, 2923920, 3411240, 4093488, 5116860, 6822480, 10233720, 20467440]

約数ペア:

[(1, 20467440), (2, 10233720), (3, 6822480), (4, 5116860), (5, 4093488), (6, 3411240), (7, 2923920), (8, 2558430), (9, 2274160), (10, 2046744), (12, 1705620), (14, 1461960), (15, 1364496), (16, 1279215), (18, 1137080), (20, 1023372), (21, 974640), (24, 852810), (28, 730980), (30, 682248), (31, 660240), (35, 584784), (36, 568540), (40, 511686), (42, 487320), (45, 454832), (48, 426405), (56, 365490), (60, 341124), (62, 330120), (63, 324880), (70, 292392), (72, 284270), (80, 255843), (84, 243660), (90, 227416), (93, 220080), (105, 194928), (112, 182745), (120, 170562), (124, 165060), (126, 162440), (131, 156240), (140, 146196), (144, 142135), (155, 132048), (168, 121830), (180, 113708), (186, 110040), (210, 97464), (217, 94320), (240, 85281), (248, 82530), (252, 81220), (262, 78120), (279, 73360), (280, 73098), (310, 66024), (315, 64976), (336, 60915), (360, 56854), (372, 55020), (393, 52080), (420, 48732), (434, 47160), (465, 44016), (496, 41265), (504, 40610), (524, 39060), (558, 36680), (560, 36549), (620, 33012), (630, 32488), (651, 31440), (655, 31248), (720, 28427), (744, 27510), (786, 26040), (840, 24366), (868, 23580), (917, 22320), (930, 22008), (1008, 20305), (1048, 19530), (1085, 18864), (1116, 18340), (1179, 17360), (1240, 16506), (1260, 16244), (1302, 15720), (1310, 15624), (1395, 14672), (1488, 13755), (1572, 13020), (1680, 12183), (1736, 11790), (1834, 11160), (1860, 11004), (1953, 10480), (1965, 10416), (2096, 9765), (2170, 9432), (2232, 9170), (2358, 8680), (2480, 8253), (2520, 8122), (2604, 7860), (2620, 7812), (2751, 7440), (2790, 7336), (3144, 6510), (3255, 6288), (3472, 5895), (3668, 5580), (3720, 5502), (3906, 5240), (3930, 5208), (4061, 5040), (4340, 4716), (4464, 4585)]