20485920

素因数分解:

$2^5\times 3^1\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{67}}^1$

素因数の和:112

約数の個数: 288

約数和(自身を含む): 82047168

約数和(自身を除く): 61561248

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 13, 14, 15, 16, 20, 21, 24, 26, 28, 30, 32, 35, 39, 40, 42, 48, 49, 52, 56, 60, 65, 67, 70, 78, 80, 84, 91, 96, 98, 104, 105, 112, 120, 130, 134, 140, 147, 156, 160, 168, 182, 195, 196, 201, 208, 210, 224, 240, 245, 260, 268, 273, 280, 294, 312, 335, 336, 364, 390, 392, 402, 416, 420, 455, 469, 480, 490, 520, 536, 546, 560, 588, 624, 637, 670, 672, 728, 735, 780, 784, 804, 840, 871, 910, 938, 980, 1005, 1040, 1072, 1092, 1120, 1176, 1248, 1274, 1340, 1365, 1407, 1456, 1470, 1560, 1568, 1608, 1680, 1742, 1820, 1876, 1911, 1960, 2010, 2080, 2144, 2184, 2345, 2352, 2548, 2613, 2680, 2730, 2814, 2912, 2940, 3120, 3185, 3216, 3283, 3360, 3484, 3640, 3752, 3822, 3920, 4020, 4355, 4368, 4690, 4704, 5096, 5226, 5360, 5460, 5628, 5880, 6097, 6240, 6370, 6432, 6566, 6968, 7035, 7280, 7504, 7644, 7840, 8040, 8710, 8736, 9380, 9555, 9849, 10192, 10452, 10720, 10920, 11256, 11760, 12194, 12740, 13065, 13132, 13936, 14070, 14560, 15008, 15288, 16080, 16415, 17420, 18291, 18760, 19110, 19698, 20384, 20904, 21840, 22512, 23520, 24388, 25480, 26130, 26264, 27872, 28140, 30485, 30576, 32160, 32830, 34840, 36582, 37520, 38220, 39396, 41808, 42679, 43680, 45024, 48776, 49245, 50960, 52260, 52528, 56280, 60970, 61152, 65660, 69680, 73164, 75040, 76440, 78792, 83616, 85358, 91455, 97552, 98490, 101920, 104520, 105056, 112560, 121940, 128037, 131320, 139360, 146328, 152880, 157584, 170716, 182910, 195104, 196980, 209040, 213395, 225120, 243880, 256074, 262640, 292656, 305760, 315168, 341432, 365820, 393960, 418080, 426790, 487760, 512148, 525280, 585312, 640185, 682864, 731640, 787920, 853580, 975520, 1024296, 1280370, 1365728, 1463280, 1575840, 1707160, 2048592, 2560740, 2926560, 3414320, 4097184, 5121480, 6828640, 10242960, 20485920]

約数ペア:

[(1, 20485920), (2, 10242960), (3, 6828640), (4, 5121480), (5, 4097184), (6, 3414320), (7, 2926560), (8, 2560740), (10, 2048592), (12, 1707160), (13, 1575840), (14, 1463280), (15, 1365728), (16, 1280370), (20, 1024296), (21, 975520), (24, 853580), (26, 787920), (28, 731640), (30, 682864), (32, 640185), (35, 585312), (39, 525280), (40, 512148), (42, 487760), (48, 426790), (49, 418080), (52, 393960), (56, 365820), (60, 341432), (65, 315168), (67, 305760), (70, 292656), (78, 262640), (80, 256074), (84, 243880), (91, 225120), (96, 213395), (98, 209040), (104, 196980), (105, 195104), (112, 182910), (120, 170716), (130, 157584), (134, 152880), (140, 146328), (147, 139360), (156, 131320), (160, 128037), (168, 121940), (182, 112560), (195, 105056), (196, 104520), (201, 101920), (208, 98490), (210, 97552), (224, 91455), (240, 85358), (245, 83616), (260, 78792), (268, 76440), (273, 75040), (280, 73164), (294, 69680), (312, 65660), (335, 61152), (336, 60970), (364, 56280), (390, 52528), (392, 52260), (402, 50960), (416, 49245), (420, 48776), (455, 45024), (469, 43680), (480, 42679), (490, 41808), (520, 39396), (536, 38220), (546, 37520), (560, 36582), (588, 34840), (624, 32830), (637, 32160), (670, 30576), (672, 30485), (728, 28140), (735, 27872), (780, 26264), (784, 26130), (804, 25480), (840, 24388), (871, 23520), (910, 22512), (938, 21840), (980, 20904), (1005, 20384), (1040, 19698), (1072, 19110), (1092, 18760), (1120, 18291), (1176, 17420), (1248, 16415), (1274, 16080), (1340, 15288), (1365, 15008), (1407, 14560), (1456, 14070), (1470, 13936), (1560, 13132), (1568, 13065), (1608, 12740), (1680, 12194), (1742, 11760), (1820, 11256), (1876, 10920), (1911, 10720), (1960, 10452), (2010, 10192), (2080, 9849), (2144, 9555), (2184, 9380), (2345, 8736), (2352, 8710), (2548, 8040), (2613, 7840), (2680, 7644), (2730, 7504), (2814, 7280), (2912, 7035), (2940, 6968), (3120, 6566), (3185, 6432), (3216, 6370), (3283, 6240), (3360, 6097), (3484, 5880), (3640, 5628), (3752, 5460), (3822, 5360), (3920, 5226), (4020, 5096), (4355, 4704), (4368, 4690)]