21688576

素因数分解:

$2^8\times 7^3\times {\mathrm{13}}^1\times {\mathrm{19}}^1$

素因数の和:69

約数の個数: 144

約数和(自身を含む): 57232000

約数和(自身を除く): 35543424

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 19, 26, 28, 32, 38, 49, 52, 56, 64, 76, 91, 98, 104, 112, 128, 133, 152, 182, 196, 208, 224, 247, 256, 266, 304, 343, 364, 392, 416, 448, 494, 532, 608, 637, 686, 728, 784, 832, 896, 931, 988, 1064, 1216, 1274, 1372, 1456, 1568, 1664, 1729, 1792, 1862, 1976, 2128, 2432, 2548, 2744, 2912, 3136, 3328, 3458, 3724, 3952, 4256, 4459, 4864, 5096, 5488, 5824, 6272, 6517, 6916, 7448, 7904, 8512, 8918, 10192, 10976, 11648, 12103, 12544, 13034, 13832, 14896, 15808, 17024, 17836, 20384, 21952, 23296, 24206, 26068, 27664, 29792, 31616, 34048, 35672, 40768, 43904, 48412, 52136, 55328, 59584, 63232, 71344, 81536, 84721, 87808, 96824, 104272, 110656, 119168, 142688, 163072, 169442, 193648, 208544, 221312, 238336, 285376, 338884, 387296, 417088, 442624, 570752, 677768, 774592, 834176, 1141504, 1355536, 1549184, 1668352, 2711072, 3098368, 5422144, 10844288, 21688576]

約数ペア:

[(1, 21688576), (2, 10844288), (4, 5422144), (7, 3098368), (8, 2711072), (13, 1668352), (14, 1549184), (16, 1355536), (19, 1141504), (26, 834176), (28, 774592), (32, 677768), (38, 570752), (49, 442624), (52, 417088), (56, 387296), (64, 338884), (76, 285376), (91, 238336), (98, 221312), (104, 208544), (112, 193648), (128, 169442), (133, 163072), (152, 142688), (182, 119168), (196, 110656), (208, 104272), (224, 96824), (247, 87808), (256, 84721), (266, 81536), (304, 71344), (343, 63232), (364, 59584), (392, 55328), (416, 52136), (448, 48412), (494, 43904), (532, 40768), (608, 35672), (637, 34048), (686, 31616), (728, 29792), (784, 27664), (832, 26068), (896, 24206), (931, 23296), (988, 21952), (1064, 20384), (1216, 17836), (1274, 17024), (1372, 15808), (1456, 14896), (1568, 13832), (1664, 13034), (1729, 12544), (1792, 12103), (1862, 11648), (1976, 10976), (2128, 10192), (2432, 8918), (2548, 8512), (2744, 7904), (2912, 7448), (3136, 6916), (3328, 6517), (3458, 6272), (3724, 5824), (3952, 5488), (4256, 5096), (4459, 4864)]