20554784

素因数分解:

$2^5\times {\mathrm{71}}^1\times {\mathrm{83}}^1\times {\mathrm{109}}^1$

素因数の和:273

約数の個数: 48

約数和(自身を含む): 41912640

約数和(自身を除く): 21357856

約数列:

[1, 2, 4, 8, 16, 32, 71, 83, 109, 142, 166, 218, 284, 332, 436, 568, 664, 872, 1136, 1328, 1744, 2272, 2656, 3488, 5893, 7739, 9047, 11786, 15478, 18094, 23572, 30956, 36188, 47144, 61912, 72376, 94288, 123824, 144752, 188576, 247648, 289504, 642337, 1284674, 2569348, 5138696, 10277392, 20554784]

約数ペア:

[(1, 20554784), (2, 10277392), (4, 5138696), (8, 2569348), (16, 1284674), (32, 642337), (71, 289504), (83, 247648), (109, 188576), (142, 144752), (166, 123824), (218, 94288), (284, 72376), (332, 61912), (436, 47144), (568, 36188), (664, 30956), (872, 23572), (1136, 18094), (1328, 15478), (1744, 11786), (2272, 9047), (2656, 7739), (3488, 5893)]