28128991

素因数分解:

${\mathrm{11}}^2\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{103}}^1$

素因数の和:223

約数の個数: 24

約数和(自身を含む): 32588192

約数和(自身を除く): 4459201

約数列:

[1, 11, 37, 61, 103, 121, 407, 671, 1133, 2257, 3811, 4477, 6283, 7381, 12463, 24827, 41921, 69113, 232471, 273097, 461131, 760243, 2557181, 28128991]

約数ペア:

[(1, 28128991), (11, 2557181), (37, 760243), (61, 461131), (103, 273097), (121, 232471), (407, 69113), (671, 41921), (1133, 24827), (2257, 12463), (3811, 7381), (4477, 6283)]