20355840

素因数分解:

$2^8\times 3^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1$

素因数の和:80

約数の個数: 288

約数和(自身を含む): 78489600

約数和(自身を除く): 58133760

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 19, 20, 24, 27, 30, 31, 32, 36, 38, 40, 45, 48, 54, 57, 60, 62, 64, 72, 76, 80, 90, 93, 95, 96, 108, 114, 120, 124, 128, 135, 144, 152, 155, 160, 171, 180, 186, 190, 192, 216, 228, 240, 248, 256, 270, 279, 285, 288, 304, 310, 320, 342, 360, 372, 380, 384, 432, 456, 465, 480, 496, 513, 540, 558, 570, 576, 589, 608, 620, 640, 684, 720, 744, 760, 768, 837, 855, 864, 912, 930, 960, 992, 1026, 1080, 1116, 1140, 1152, 1178, 1216, 1240, 1280, 1368, 1395, 1440, 1488, 1520, 1674, 1710, 1728, 1767, 1824, 1860, 1920, 1984, 2052, 2160, 2232, 2280, 2304, 2356, 2432, 2480, 2565, 2736, 2790, 2880, 2945, 2976, 3040, 3348, 3420, 3456, 3534, 3648, 3720, 3840, 3968, 4104, 4185, 4320, 4464, 4560, 4712, 4864, 4960, 5130, 5301, 5472, 5580, 5760, 5890, 5952, 6080, 6696, 6840, 6912, 7068, 7296, 7440, 7936, 8208, 8370, 8640, 8835, 8928, 9120, 9424, 9920, 10260, 10602, 10944, 11160, 11520, 11780, 11904, 12160, 13392, 13680, 14136, 14592, 14880, 15903, 16416, 16740, 17280, 17670, 17856, 18240, 18848, 19840, 20520, 21204, 21888, 22320, 23560, 23808, 24320, 26505, 26784, 27360, 28272, 29760, 31806, 32832, 33480, 34560, 35340, 35712, 36480, 37696, 39680, 41040, 42408, 43776, 44640, 47120, 53010, 53568, 54720, 56544, 59520, 63612, 65664, 66960, 70680, 71424, 72960, 75392, 79515, 82080, 84816, 89280, 94240, 106020, 107136, 109440, 113088, 119040, 127224, 131328, 133920, 141360, 150784, 159030, 164160, 169632, 178560, 188480, 212040, 214272, 218880, 226176, 254448, 267840, 282720, 318060, 328320, 339264, 357120, 376960, 424080, 452352, 508896, 535680, 565440, 636120, 656640, 678528, 753920, 848160, 1017792, 1071360, 1130880, 1272240, 1357056, 1696320, 2035584, 2261760, 2544480, 3392640, 4071168, 5088960, 6785280, 10177920, 20355840]

約数ペア:

[(1, 20355840), (2, 10177920), (3, 6785280), (4, 5088960), (5, 4071168), (6, 3392640), (8, 2544480), (9, 2261760), (10, 2035584), (12, 1696320), (15, 1357056), (16, 1272240), (18, 1130880), (19, 1071360), (20, 1017792), (24, 848160), (27, 753920), (30, 678528), (31, 656640), (32, 636120), (36, 565440), (38, 535680), (40, 508896), (45, 452352), (48, 424080), (54, 376960), (57, 357120), (60, 339264), (62, 328320), (64, 318060), (72, 282720), (76, 267840), (80, 254448), (90, 226176), (93, 218880), (95, 214272), (96, 212040), (108, 188480), (114, 178560), (120, 169632), (124, 164160), (128, 159030), (135, 150784), (144, 141360), (152, 133920), (155, 131328), (160, 127224), (171, 119040), (180, 113088), (186, 109440), (190, 107136), (192, 106020), (216, 94240), (228, 89280), (240, 84816), (248, 82080), (256, 79515), (270, 75392), (279, 72960), (285, 71424), (288, 70680), (304, 66960), (310, 65664), (320, 63612), (342, 59520), (360, 56544), (372, 54720), (380, 53568), (384, 53010), (432, 47120), (456, 44640), (465, 43776), (480, 42408), (496, 41040), (513, 39680), (540, 37696), (558, 36480), (570, 35712), (576, 35340), (589, 34560), (608, 33480), (620, 32832), (640, 31806), (684, 29760), (720, 28272), (744, 27360), (760, 26784), (768, 26505), (837, 24320), (855, 23808), (864, 23560), (912, 22320), (930, 21888), (960, 21204), (992, 20520), (1026, 19840), (1080, 18848), (1116, 18240), (1140, 17856), (1152, 17670), (1178, 17280), (1216, 16740), (1240, 16416), (1280, 15903), (1368, 14880), (1395, 14592), (1440, 14136), (1488, 13680), (1520, 13392), (1674, 12160), (1710, 11904), (1728, 11780), (1767, 11520), (1824, 11160), (1860, 10944), (1920, 10602), (1984, 10260), (2052, 9920), (2160, 9424), (2232, 9120), (2280, 8928), (2304, 8835), (2356, 8640), (2432, 8370), (2480, 8208), (2565, 7936), (2736, 7440), (2790, 7296), (2880, 7068), (2945, 6912), (2976, 6840), (3040, 6696), (3348, 6080), (3420, 5952), (3456, 5890), (3534, 5760), (3648, 5580), (3720, 5472), (3840, 5301), (3968, 5130), (4104, 4960), (4185, 4864), (4320, 4712), (4464, 4560)]