19977984

素因数分解:

$2^8\times 3^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1$

素因数の和:87

約数の個数: 216

約数和(自身を含む): 66961440

約数和(自身を除く): 46983456

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 13, 16, 18, 23, 24, 26, 29, 32, 36, 39, 46, 48, 52, 58, 64, 69, 72, 78, 87, 92, 96, 104, 116, 117, 128, 138, 144, 156, 174, 184, 192, 207, 208, 232, 234, 256, 261, 276, 288, 299, 312, 348, 368, 377, 384, 414, 416, 464, 468, 522, 552, 576, 598, 624, 667, 696, 736, 754, 768, 828, 832, 897, 928, 936, 1044, 1104, 1131, 1152, 1196, 1248, 1334, 1392, 1472, 1508, 1656, 1664, 1794, 1856, 1872, 2001, 2088, 2208, 2262, 2304, 2392, 2496, 2668, 2691, 2784, 2944, 3016, 3312, 3328, 3393, 3588, 3712, 3744, 4002, 4176, 4416, 4524, 4784, 4992, 5336, 5382, 5568, 5888, 6003, 6032, 6624, 6786, 7176, 7424, 7488, 8004, 8352, 8671, 8832, 9048, 9568, 9984, 10672, 10764, 11136, 12006, 12064, 13248, 13572, 14352, 14976, 16008, 16704, 17342, 17664, 18096, 19136, 21344, 21528, 22272, 24012, 24128, 26013, 26496, 27144, 28704, 29952, 32016, 33408, 34684, 36192, 38272, 42688, 43056, 48024, 48256, 52026, 52992, 54288, 57408, 64032, 66816, 69368, 72384, 76544, 78039, 85376, 86112, 96048, 96512, 104052, 108576, 114816, 128064, 138736, 144768, 156078, 170752, 172224, 192096, 208104, 217152, 229632, 256128, 277472, 289536, 312156, 344448, 384192, 416208, 434304, 512256, 554944, 624312, 688896, 768384, 832416, 868608, 1109888, 1248624, 1536768, 1664832, 2219776, 2497248, 3329664, 4994496, 6659328, 9988992, 19977984]

約数ペア:

[(1, 19977984), (2, 9988992), (3, 6659328), (4, 4994496), (6, 3329664), (8, 2497248), (9, 2219776), (12, 1664832), (13, 1536768), (16, 1248624), (18, 1109888), (23, 868608), (24, 832416), (26, 768384), (29, 688896), (32, 624312), (36, 554944), (39, 512256), (46, 434304), (48, 416208), (52, 384192), (58, 344448), (64, 312156), (69, 289536), (72, 277472), (78, 256128), (87, 229632), (92, 217152), (96, 208104), (104, 192096), (116, 172224), (117, 170752), (128, 156078), (138, 144768), (144, 138736), (156, 128064), (174, 114816), (184, 108576), (192, 104052), (207, 96512), (208, 96048), (232, 86112), (234, 85376), (256, 78039), (261, 76544), (276, 72384), (288, 69368), (299, 66816), (312, 64032), (348, 57408), (368, 54288), (377, 52992), (384, 52026), (414, 48256), (416, 48024), (464, 43056), (468, 42688), (522, 38272), (552, 36192), (576, 34684), (598, 33408), (624, 32016), (667, 29952), (696, 28704), (736, 27144), (754, 26496), (768, 26013), (828, 24128), (832, 24012), (897, 22272), (928, 21528), (936, 21344), (1044, 19136), (1104, 18096), (1131, 17664), (1152, 17342), (1196, 16704), (1248, 16008), (1334, 14976), (1392, 14352), (1472, 13572), (1508, 13248), (1656, 12064), (1664, 12006), (1794, 11136), (1856, 10764), (1872, 10672), (2001, 9984), (2088, 9568), (2208, 9048), (2262, 8832), (2304, 8671), (2392, 8352), (2496, 8004), (2668, 7488), (2691, 7424), (2784, 7176), (2944, 6786), (3016, 6624), (3312, 6032), (3328, 6003), (3393, 5888), (3588, 5568), (3712, 5382), (3744, 5336), (4002, 4992), (4176, 4784), (4416, 4524)]