20905760

素因数分解:

$2^5\times 5^1\times {\mathrm{193}}^1\times {\mathrm{677}}^1$

素因数の和:885

約数の個数: 48

約数和(自身を含む): 49719096

約数和(自身を除く): 28813336

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 193, 386, 677, 772, 965, 1354, 1544, 1930, 2708, 3088, 3385, 3860, 5416, 6176, 6770, 7720, 10832, 13540, 15440, 21664, 27080, 30880, 54160, 108320, 130661, 261322, 522644, 653305, 1045288, 1306610, 2090576, 2613220, 4181152, 5226440, 10452880, 20905760]

約数ペア:

[(1, 20905760), (2, 10452880), (4, 5226440), (5, 4181152), (8, 2613220), (10, 2090576), (16, 1306610), (20, 1045288), (32, 653305), (40, 522644), (80, 261322), (160, 130661), (193, 108320), (386, 54160), (677, 30880), (772, 27080), (965, 21664), (1354, 15440), (1544, 13540), (1930, 10832), (2708, 7720), (3088, 6770), (3385, 6176), (3860, 5416)]