20755980

素因数分解:

$2^2\times 3^3\times 5^1\times 7^1\times {\mathrm{17}}^2\times {\mathrm{19}}^1$

素因数の和:78

約数の個数: 288

約数和(自身を含む): 82521600

約数和(自身を除く): 61765620

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 17, 18, 19, 20, 21, 27, 28, 30, 34, 35, 36, 38, 42, 45, 51, 54, 57, 60, 63, 68, 70, 76, 84, 85, 90, 95, 102, 105, 108, 114, 119, 126, 133, 135, 140, 153, 170, 171, 180, 189, 190, 204, 210, 228, 238, 252, 255, 266, 270, 285, 289, 306, 315, 323, 340, 342, 357, 378, 380, 399, 420, 459, 476, 510, 513, 532, 540, 570, 578, 595, 612, 630, 646, 665, 684, 714, 756, 765, 798, 855, 867, 918, 945, 969, 1020, 1026, 1071, 1140, 1156, 1190, 1197, 1260, 1292, 1330, 1428, 1445, 1530, 1596, 1615, 1710, 1734, 1785, 1836, 1890, 1938, 1995, 2023, 2052, 2142, 2261, 2295, 2380, 2394, 2565, 2601, 2660, 2890, 2907, 3060, 3213, 3230, 3420, 3468, 3570, 3591, 3780, 3876, 3990, 4046, 4284, 4335, 4522, 4590, 4788, 4845, 5130, 5202, 5355, 5491, 5780, 5814, 5985, 6069, 6426, 6460, 6783, 7140, 7182, 7803, 7980, 8092, 8670, 8721, 9044, 9180, 9690, 10115, 10260, 10404, 10710, 10982, 11305, 11628, 11970, 12138, 12852, 13005, 13566, 14364, 14535, 15606, 16065, 16473, 17340, 17442, 17955, 18207, 19380, 20230, 20349, 21420, 21964, 22610, 23940, 24276, 26010, 27132, 27455, 29070, 30345, 31212, 32130, 32946, 33915, 34884, 35910, 36414, 38437, 39015, 40460, 40698, 43605, 45220, 49419, 52020, 54621, 54910, 58140, 60690, 61047, 64260, 65892, 67830, 71820, 72828, 76874, 78030, 81396, 82365, 87210, 91035, 98838, 101745, 109242, 109820, 115311, 121380, 122094, 135660, 148257, 153748, 156060, 164730, 174420, 182070, 192185, 197676, 203490, 218484, 230622, 244188, 247095, 273105, 296514, 305235, 329460, 345933, 364140, 384370, 406980, 461244, 494190, 546210, 576555, 593028, 610470, 691866, 741285, 768740, 988380, 1037799, 1092420, 1153110, 1220940, 1383732, 1482570, 1729665, 2075598, 2306220, 2965140, 3459330, 4151196, 5188995, 6918660, 10377990, 20755980]

約数ペア:

[(1, 20755980), (2, 10377990), (3, 6918660), (4, 5188995), (5, 4151196), (6, 3459330), (7, 2965140), (9, 2306220), (10, 2075598), (12, 1729665), (14, 1482570), (15, 1383732), (17, 1220940), (18, 1153110), (19, 1092420), (20, 1037799), (21, 988380), (27, 768740), (28, 741285), (30, 691866), (34, 610470), (35, 593028), (36, 576555), (38, 546210), (42, 494190), (45, 461244), (51, 406980), (54, 384370), (57, 364140), (60, 345933), (63, 329460), (68, 305235), (70, 296514), (76, 273105), (84, 247095), (85, 244188), (90, 230622), (95, 218484), (102, 203490), (105, 197676), (108, 192185), (114, 182070), (119, 174420), (126, 164730), (133, 156060), (135, 153748), (140, 148257), (153, 135660), (170, 122094), (171, 121380), (180, 115311), (189, 109820), (190, 109242), (204, 101745), (210, 98838), (228, 91035), (238, 87210), (252, 82365), (255, 81396), (266, 78030), (270, 76874), (285, 72828), (289, 71820), (306, 67830), (315, 65892), (323, 64260), (340, 61047), (342, 60690), (357, 58140), (378, 54910), (380, 54621), (399, 52020), (420, 49419), (459, 45220), (476, 43605), (510, 40698), (513, 40460), (532, 39015), (540, 38437), (570, 36414), (578, 35910), (595, 34884), (612, 33915), (630, 32946), (646, 32130), (665, 31212), (684, 30345), (714, 29070), (756, 27455), (765, 27132), (798, 26010), (855, 24276), (867, 23940), (918, 22610), (945, 21964), (969, 21420), (1020, 20349), (1026, 20230), (1071, 19380), (1140, 18207), (1156, 17955), (1190, 17442), (1197, 17340), (1260, 16473), (1292, 16065), (1330, 15606), (1428, 14535), (1445, 14364), (1530, 13566), (1596, 13005), (1615, 12852), (1710, 12138), (1734, 11970), (1785, 11628), (1836, 11305), (1890, 10982), (1938, 10710), (1995, 10404), (2023, 10260), (2052, 10115), (2142, 9690), (2261, 9180), (2295, 9044), (2380, 8721), (2394, 8670), (2565, 8092), (2601, 7980), (2660, 7803), (2890, 7182), (2907, 7140), (3060, 6783), (3213, 6460), (3230, 6426), (3420, 6069), (3468, 5985), (3570, 5814), (3591, 5780), (3780, 5491), (3876, 5355), (3990, 5202), (4046, 5130), (4284, 4845), (4335, 4788), (4522, 4590)]