21559901

素因数分解:

${\mathrm{11}}^2\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{127}}^1$

素因数の和:233

約数の個数: 24

約数和(自身を含む): 25331712

約数和(自身を除く): 3771811

約数列:

[1, 11, 23, 61, 121, 127, 253, 671, 1397, 1403, 2783, 2921, 7381, 7747, 15367, 15433, 32131, 85217, 169763, 178181, 353441, 937387, 1959991, 21559901]

約数ペア:

[(1, 21559901), (11, 1959991), (23, 937387), (61, 353441), (121, 178181), (127, 169763), (253, 85217), (671, 32131), (1397, 15433), (1403, 15367), (2783, 7747), (2921, 7381)]