21087872

素因数分解:

$2^7\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1$

素因数の和:98

約数の個数: 128

約数和(自身を含む): 51408000

約数和(自身を除く): 30320128

約数列:

[1, 2, 4, 8, 13, 16, 19, 23, 26, 29, 32, 38, 46, 52, 58, 64, 76, 92, 104, 116, 128, 152, 184, 208, 232, 247, 299, 304, 368, 377, 416, 437, 464, 494, 551, 598, 608, 667, 736, 754, 832, 874, 928, 988, 1102, 1196, 1216, 1334, 1472, 1508, 1664, 1748, 1856, 1976, 2204, 2392, 2432, 2668, 2944, 3016, 3496, 3712, 3952, 4408, 4784, 5336, 5681, 6032, 6992, 7163, 7904, 8671, 8816, 9568, 10672, 11362, 12064, 12673, 13984, 14326, 15808, 17342, 17632, 19136, 21344, 22724, 24128, 25346, 27968, 28652, 31616, 34684, 35264, 38272, 42688, 45448, 48256, 50692, 55936, 57304, 69368, 70528, 85376, 90896, 101384, 114608, 138736, 164749, 181792, 202768, 229216, 277472, 329498, 363584, 405536, 458432, 554944, 658996, 727168, 811072, 916864, 1109888, 1317992, 1622144, 2635984, 5271968, 10543936, 21087872]

約数ペア:

[(1, 21087872), (2, 10543936), (4, 5271968), (8, 2635984), (13, 1622144), (16, 1317992), (19, 1109888), (23, 916864), (26, 811072), (29, 727168), (32, 658996), (38, 554944), (46, 458432), (52, 405536), (58, 363584), (64, 329498), (76, 277472), (92, 229216), (104, 202768), (116, 181792), (128, 164749), (152, 138736), (184, 114608), (208, 101384), (232, 90896), (247, 85376), (299, 70528), (304, 69368), (368, 57304), (377, 55936), (416, 50692), (437, 48256), (464, 45448), (494, 42688), (551, 38272), (598, 35264), (608, 34684), (667, 31616), (736, 28652), (754, 27968), (832, 25346), (874, 24128), (928, 22724), (988, 21344), (1102, 19136), (1196, 17632), (1216, 17342), (1334, 15808), (1472, 14326), (1508, 13984), (1664, 12673), (1748, 12064), (1856, 11362), (1976, 10672), (2204, 9568), (2392, 8816), (2432, 8671), (2668, 7904), (2944, 7163), (3016, 6992), (3496, 6032), (3712, 5681), (3952, 5336), (4408, 4784)]