21018368

素因数分解:

$2^8\times 7^1\times {\mathrm{37}}^1\times {\mathrm{317}}^1$

素因数の和:377

約数の個数: 72

約数和(自身を含む): 49399392

約数和(自身を除く): 28381024

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 37, 56, 64, 74, 112, 128, 148, 224, 256, 259, 296, 317, 448, 518, 592, 634, 896, 1036, 1184, 1268, 1792, 2072, 2219, 2368, 2536, 4144, 4438, 4736, 5072, 8288, 8876, 9472, 10144, 11729, 16576, 17752, 20288, 23458, 33152, 35504, 40576, 46916, 66304, 71008, 81152, 82103, 93832, 142016, 164206, 187664, 284032, 328412, 375328, 568064, 656824, 750656, 1313648, 1501312, 2627296, 3002624, 5254592, 10509184, 21018368]

約数ペア:

[(1, 21018368), (2, 10509184), (4, 5254592), (7, 3002624), (8, 2627296), (14, 1501312), (16, 1313648), (28, 750656), (32, 656824), (37, 568064), (56, 375328), (64, 328412), (74, 284032), (112, 187664), (128, 164206), (148, 142016), (224, 93832), (256, 82103), (259, 81152), (296, 71008), (317, 66304), (448, 46916), (518, 40576), (592, 35504), (634, 33152), (896, 23458), (1036, 20288), (1184, 17752), (1268, 16576), (1792, 11729), (2072, 10144), (2219, 9472), (2368, 8876), (2536, 8288), (4144, 5072), (4438, 4736)]