20168885

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1$

素因数の和:134

約数の個数: 48

約数和(自身を含む): 29474928

約数和(自身を除く): 9306043

約数列:

[1, 5, 11, 17, 37, 53, 55, 85, 121, 185, 187, 265, 407, 583, 605, 629, 901, 935, 1961, 2035, 2057, 2915, 3145, 4477, 4505, 6413, 6919, 9805, 9911, 10285, 21571, 22385, 32065, 33337, 34595, 49555, 76109, 107855, 109021, 166685, 237281, 366707, 380545, 545105, 1186405, 1833535, 4033777, 20168885]

約数ペア:

[(1, 20168885), (5, 4033777), (11, 1833535), (17, 1186405), (37, 545105), (53, 380545), (55, 366707), (85, 237281), (121, 166685), (185, 109021), (187, 107855), (265, 76109), (407, 49555), (583, 34595), (605, 33337), (629, 32065), (901, 22385), (935, 21571), (1961, 10285), (2035, 9911), (2057, 9805), (2915, 6919), (3145, 6413), (4477, 4505)]