20821808

素因数分解:

$2^4\times 7^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{137}}^1$

素因数の和:234

約数の個数: 80

約数和(自身を含む): 49282560

約数和(自身を除く): 28460752

約数列:

[1, 2, 4, 7, 8, 14, 16, 23, 28, 46, 56, 59, 92, 112, 118, 137, 161, 184, 236, 274, 322, 368, 413, 472, 548, 644, 826, 944, 959, 1096, 1288, 1357, 1652, 1918, 2192, 2576, 2714, 3151, 3304, 3836, 5428, 6302, 6608, 7672, 8083, 9499, 10856, 12604, 15344, 16166, 18998, 21712, 22057, 25208, 32332, 37996, 44114, 50416, 56581, 64664, 75992, 88228, 113162, 129328, 151984, 176456, 185909, 226324, 352912, 371818, 452648, 743636, 905296, 1301363, 1487272, 2602726, 2974544, 5205452, 10410904, 20821808]

約数ペア:

[(1, 20821808), (2, 10410904), (4, 5205452), (7, 2974544), (8, 2602726), (14, 1487272), (16, 1301363), (23, 905296), (28, 743636), (46, 452648), (56, 371818), (59, 352912), (92, 226324), (112, 185909), (118, 176456), (137, 151984), (161, 129328), (184, 113162), (236, 88228), (274, 75992), (322, 64664), (368, 56581), (413, 50416), (472, 44114), (548, 37996), (644, 32332), (826, 25208), (944, 22057), (959, 21712), (1096, 18998), (1288, 16166), (1357, 15344), (1652, 12604), (1918, 10856), (2192, 9499), (2576, 8083), (2714, 7672), (3151, 6608), (3304, 6302), (3836, 5428)]