21691285

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{103}}^1\times {\mathrm{547}}^1$

素因数の和:673

約数の個数: 32

約数和(自身を含む): 32827392

約数和(自身を除く): 11136107

約数列:

[1, 5, 7, 11, 35, 55, 77, 103, 385, 515, 547, 721, 1133, 2735, 3605, 3829, 5665, 6017, 7931, 19145, 30085, 39655, 42119, 56341, 210595, 281705, 394387, 619751, 1971935, 3098755, 4338257, 21691285]

約数ペア:

[(1, 21691285), (5, 4338257), (7, 3098755), (11, 1971935), (35, 619751), (55, 394387), (77, 281705), (103, 210595), (385, 56341), (515, 42119), (547, 39655), (721, 30085), (1133, 19145), (2735, 7931), (3605, 6017), (3829, 5665)]