20491168

素因数分解:

$2^5\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{311}}^1$

素因数の和:421

約数の個数: 48

約数和(自身を含む): 42456960

約数和(自身を除く): 21965792

約数列:

[1, 2, 4, 8, 16, 29, 32, 58, 71, 116, 142, 232, 284, 311, 464, 568, 622, 928, 1136, 1244, 2059, 2272, 2488, 4118, 4976, 8236, 9019, 9952, 16472, 18038, 22081, 32944, 36076, 44162, 65888, 72152, 88324, 144304, 176648, 288608, 353296, 640349, 706592, 1280698, 2561396, 5122792, 10245584, 20491168]

約数ペア:

[(1, 20491168), (2, 10245584), (4, 5122792), (8, 2561396), (16, 1280698), (29, 706592), (32, 640349), (58, 353296), (71, 288608), (116, 176648), (142, 144304), (232, 88324), (284, 72152), (311, 65888), (464, 44162), (568, 36076), (622, 32944), (928, 22081), (1136, 18038), (1244, 16472), (2059, 9952), (2272, 9019), (2488, 8236), (4118, 4976)]