21687568

素因数分解:

$2^4\times 7^1\times {\mathrm{83}}^1\times {\mathrm{2333}}^1$

素因数の和:2431

約数の個数: 40

約数和(自身を含む): 48621888

約数和(自身を除く): 26934320

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 83, 112, 166, 332, 581, 664, 1162, 1328, 2324, 2333, 4648, 4666, 9296, 9332, 16331, 18664, 32662, 37328, 65324, 130648, 193639, 261296, 387278, 774556, 1355473, 1549112, 2710946, 3098224, 5421892, 10843784, 21687568]

約数ペア:

[(1, 21687568), (2, 10843784), (4, 5421892), (7, 3098224), (8, 2710946), (14, 1549112), (16, 1355473), (28, 774556), (56, 387278), (83, 261296), (112, 193639), (166, 130648), (332, 65324), (581, 37328), (664, 32662), (1162, 18664), (1328, 16331), (2324, 9332), (2333, 9296), (4648, 4666)]