20780032

素因数分解:

$2^{10}\times 7^1\times {\mathrm{13}}^1\times {\mathrm{223}}^1$

素因数の和:263

約数の個数: 88

約数和(自身を含む): 51355136

約数和(自身を除く): 30575104

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 32, 52, 56, 64, 91, 104, 112, 128, 182, 208, 223, 224, 256, 364, 416, 446, 448, 512, 728, 832, 892, 896, 1024, 1456, 1561, 1664, 1784, 1792, 2899, 2912, 3122, 3328, 3568, 3584, 5798, 5824, 6244, 6656, 7136, 7168, 11596, 11648, 12488, 13312, 14272, 20293, 23192, 23296, 24976, 28544, 40586, 46384, 46592, 49952, 57088, 81172, 92768, 93184, 99904, 114176, 162344, 185536, 199808, 228352, 324688, 371072, 399616, 649376, 742144, 799232, 1298752, 1484288, 1598464, 2597504, 2968576, 5195008, 10390016, 20780032]

約数ペア:

[(1, 20780032), (2, 10390016), (4, 5195008), (7, 2968576), (8, 2597504), (13, 1598464), (14, 1484288), (16, 1298752), (26, 799232), (28, 742144), (32, 649376), (52, 399616), (56, 371072), (64, 324688), (91, 228352), (104, 199808), (112, 185536), (128, 162344), (182, 114176), (208, 99904), (223, 93184), (224, 92768), (256, 81172), (364, 57088), (416, 49952), (446, 46592), (448, 46384), (512, 40586), (728, 28544), (832, 24976), (892, 23296), (896, 23192), (1024, 20293), (1456, 14272), (1561, 13312), (1664, 12488), (1784, 11648), (1792, 11596), (2899, 7168), (2912, 7136), (3122, 6656), (3328, 6244), (3568, 5824), (3584, 5798)]