20521216

素因数分解:

$2^8\times {\mathrm{19}}^1\times {\mathrm{4219}}^1$

素因数の和:4254

約数の個数: 36

約数和(自身を含む): 43128400

約数和(自身を除く): 22607184

約数列:

[1, 2, 4, 8, 16, 19, 32, 38, 64, 76, 128, 152, 256, 304, 608, 1216, 2432, 4219, 4864, 8438, 16876, 33752, 67504, 80161, 135008, 160322, 270016, 320644, 540032, 641288, 1080064, 1282576, 2565152, 5130304, 10260608, 20521216]

約数ペア:

[(1, 20521216), (2, 10260608), (4, 5130304), (8, 2565152), (16, 1282576), (19, 1080064), (32, 641288), (38, 540032), (64, 320644), (76, 270016), (128, 160322), (152, 135008), (256, 80161), (304, 67504), (608, 33752), (1216, 16876), (2432, 8438), (4219, 4864)]