20678528

素因数分解:

$2^7\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{43}}^1$

素因数の和:104

約数の個数: 96

約数和(自身を含む): 48223560

約数和(自身を除く): 27545032

約数列:

[1, 2, 4, 8, 13, 16, 17, 26, 32, 34, 43, 52, 64, 68, 86, 104, 128, 136, 172, 208, 221, 272, 289, 344, 416, 442, 544, 559, 578, 688, 731, 832, 884, 1088, 1118, 1156, 1376, 1462, 1664, 1768, 2176, 2236, 2312, 2752, 2924, 3536, 3757, 4472, 4624, 5504, 5848, 7072, 7514, 8944, 9248, 9503, 11696, 12427, 14144, 15028, 17888, 18496, 19006, 23392, 24854, 28288, 30056, 35776, 36992, 38012, 46784, 49708, 60112, 71552, 76024, 93568, 99416, 120224, 152048, 161551, 198832, 240448, 304096, 323102, 397664, 480896, 608192, 646204, 795328, 1216384, 1292408, 1590656, 2584816, 5169632, 10339264, 20678528]

約数ペア:

[(1, 20678528), (2, 10339264), (4, 5169632), (8, 2584816), (13, 1590656), (16, 1292408), (17, 1216384), (26, 795328), (32, 646204), (34, 608192), (43, 480896), (52, 397664), (64, 323102), (68, 304096), (86, 240448), (104, 198832), (128, 161551), (136, 152048), (172, 120224), (208, 99416), (221, 93568), (272, 76024), (289, 71552), (344, 60112), (416, 49708), (442, 46784), (544, 38012), (559, 36992), (578, 35776), (688, 30056), (731, 28288), (832, 24854), (884, 23392), (1088, 19006), (1118, 18496), (1156, 17888), (1376, 15028), (1462, 14144), (1664, 12427), (1768, 11696), (2176, 9503), (2236, 9248), (2312, 8944), (2752, 7514), (2924, 7072), (3536, 5848), (3757, 5504), (4472, 4624)]