20718720

素因数分解:

$2^7\times 3^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{109}}^1$

素因数の和:148

約数の個数: 256

約数和(自身を含む): 80784000

約数和(自身を除く): 60065280

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 16, 18, 20, 22, 24, 27, 30, 32, 33, 36, 40, 44, 45, 48, 54, 55, 60, 64, 66, 72, 80, 88, 90, 96, 99, 108, 109, 110, 120, 128, 132, 135, 144, 160, 165, 176, 180, 192, 198, 216, 218, 220, 240, 264, 270, 288, 297, 320, 327, 330, 352, 360, 384, 396, 432, 436, 440, 480, 495, 528, 540, 545, 576, 594, 640, 654, 660, 704, 720, 792, 864, 872, 880, 960, 981, 990, 1056, 1080, 1090, 1152, 1188, 1199, 1308, 1320, 1408, 1440, 1485, 1584, 1635, 1728, 1744, 1760, 1920, 1962, 1980, 2112, 2160, 2180, 2376, 2398, 2616, 2640, 2880, 2943, 2970, 3168, 3270, 3456, 3488, 3520, 3597, 3924, 3960, 4224, 4320, 4360, 4752, 4796, 4905, 5232, 5280, 5760, 5886, 5940, 5995, 6336, 6540, 6976, 7040, 7194, 7848, 7920, 8640, 8720, 9504, 9592, 9810, 10464, 10560, 10791, 11772, 11880, 11990, 12672, 13080, 13952, 14388, 14715, 15696, 15840, 17280, 17440, 17985, 19008, 19184, 19620, 20928, 21120, 21582, 23544, 23760, 23980, 26160, 28776, 29430, 31392, 31680, 32373, 34880, 35970, 38016, 38368, 39240, 41856, 43164, 47088, 47520, 47960, 52320, 53955, 57552, 58860, 62784, 63360, 64746, 69760, 71940, 76736, 78480, 86328, 94176, 95040, 95920, 104640, 107910, 115104, 117720, 125568, 129492, 143880, 153472, 156960, 161865, 172656, 188352, 190080, 191840, 209280, 215820, 230208, 235440, 258984, 287760, 313920, 323730, 345312, 376704, 383680, 431640, 460416, 470880, 517968, 575520, 627840, 647460, 690624, 767360, 863280, 941760, 1035936, 1151040, 1294920, 1381248, 1726560, 1883520, 2071872, 2302080, 2589840, 3453120, 4143744, 5179680, 6906240, 10359360, 20718720]

約数ペア:

[(1, 20718720), (2, 10359360), (3, 6906240), (4, 5179680), (5, 4143744), (6, 3453120), (8, 2589840), (9, 2302080), (10, 2071872), (11, 1883520), (12, 1726560), (15, 1381248), (16, 1294920), (18, 1151040), (20, 1035936), (22, 941760), (24, 863280), (27, 767360), (30, 690624), (32, 647460), (33, 627840), (36, 575520), (40, 517968), (44, 470880), (45, 460416), (48, 431640), (54, 383680), (55, 376704), (60, 345312), (64, 323730), (66, 313920), (72, 287760), (80, 258984), (88, 235440), (90, 230208), (96, 215820), (99, 209280), (108, 191840), (109, 190080), (110, 188352), (120, 172656), (128, 161865), (132, 156960), (135, 153472), (144, 143880), (160, 129492), (165, 125568), (176, 117720), (180, 115104), (192, 107910), (198, 104640), (216, 95920), (218, 95040), (220, 94176), (240, 86328), (264, 78480), (270, 76736), (288, 71940), (297, 69760), (320, 64746), (327, 63360), (330, 62784), (352, 58860), (360, 57552), (384, 53955), (396, 52320), (432, 47960), (436, 47520), (440, 47088), (480, 43164), (495, 41856), (528, 39240), (540, 38368), (545, 38016), (576, 35970), (594, 34880), (640, 32373), (654, 31680), (660, 31392), (704, 29430), (720, 28776), (792, 26160), (864, 23980), (872, 23760), (880, 23544), (960, 21582), (981, 21120), (990, 20928), (1056, 19620), (1080, 19184), (1090, 19008), (1152, 17985), (1188, 17440), (1199, 17280), (1308, 15840), (1320, 15696), (1408, 14715), (1440, 14388), (1485, 13952), (1584, 13080), (1635, 12672), (1728, 11990), (1744, 11880), (1760, 11772), (1920, 10791), (1962, 10560), (1980, 10464), (2112, 9810), (2160, 9592), (2180, 9504), (2376, 8720), (2398, 8640), (2616, 7920), (2640, 7848), (2880, 7194), (2943, 7040), (2970, 6976), (3168, 6540), (3270, 6336), (3456, 5995), (3488, 5940), (3520, 5886), (3597, 5760), (3924, 5280), (3960, 5232), (4224, 4905), (4320, 4796), (4360, 4752)]