20804950900

素因数分解:

$2^2\times 5^2\times {\mathrm{29}}^1\times {\mathrm{1109}}^1\times {\mathrm{6469}}^1$

素因数の和:7621

約数の個数: 72

約数和(自身を含む): 46752867000

約数和(自身を除く): 25947916100

約数列:

[1, 2, 4, 5, 10, 20, 25, 29, 50, 58, 100, 116, 145, 290, 580, 725, 1109, 1450, 2218, 2900, 4436, 5545, 6469, 11090, 12938, 22180, 25876, 27725, 32161, 32345, 55450, 64322, 64690, 110900, 128644, 129380, 160805, 161725, 187601, 321610, 323450, 375202, 643220, 646900, 750404, 804025, 938005, 1608050, 1876010, 3216100, 3752020, 4690025, 7174121, 9380050, 14348242, 18760100, 28696484, 35870605, 71741210, 143482420, 179353025, 208049509, 358706050, 416099018, 717412100, 832198036, 1040247545, 2080495090, 4160990180, 5201237725, 10402475450, 20804950900]

約数ペア:

[(1, 20804950900), (2, 10402475450), (4, 5201237725), (5, 4160990180), (10, 2080495090), (20, 1040247545), (25, 832198036), (29, 717412100), (50, 416099018), (58, 358706050), (100, 208049509), (116, 179353025), (145, 143482420), (290, 71741210), (580, 35870605), (725, 28696484), (1109, 18760100), (1450, 14348242), (2218, 9380050), (2900, 7174121), (4436, 4690025), (5545, 3752020), (6469, 3216100), (11090, 1876010), (12938, 1608050), (22180, 938005), (25876, 804025), (27725, 750404), (32161, 646900), (32345, 643220), (55450, 375202), (64322, 323450), (64690, 321610), (110900, 187601), (128644, 161725), (129380, 160805)]