21067904

素因数分解:

$2^7\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{1151}}^1$

素因数の和:1189

約数の個数: 64

約数和(自身を含む): 49351680

約数和(自身を除く): 28283776

約数列:

[1, 2, 4, 8, 11, 13, 16, 22, 26, 32, 44, 52, 64, 88, 104, 128, 143, 176, 208, 286, 352, 416, 572, 704, 832, 1144, 1151, 1408, 1664, 2288, 2302, 4576, 4604, 9152, 9208, 12661, 14963, 18304, 18416, 25322, 29926, 36832, 50644, 59852, 73664, 101288, 119704, 147328, 164593, 202576, 239408, 329186, 405152, 478816, 658372, 810304, 957632, 1316744, 1620608, 1915264, 2633488, 5266976, 10533952, 21067904]

約数ペア:

[(1, 21067904), (2, 10533952), (4, 5266976), (8, 2633488), (11, 1915264), (13, 1620608), (16, 1316744), (22, 957632), (26, 810304), (32, 658372), (44, 478816), (52, 405152), (64, 329186), (88, 239408), (104, 202576), (128, 164593), (143, 147328), (176, 119704), (208, 101288), (286, 73664), (352, 59852), (416, 50644), (572, 36832), (704, 29926), (832, 25322), (1144, 18416), (1151, 18304), (1408, 14963), (1664, 12661), (2288, 9208), (2302, 9152), (4576, 4604)]