21591411

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{233}}^1$

素因数の和:355

約数の個数: 32

約数和(自身を含む): 32348160

約数和(自身を除く): 10756749

約数列:

[1, 3, 17, 23, 51, 69, 79, 233, 237, 391, 699, 1173, 1343, 1817, 3961, 4029, 5359, 5451, 11883, 16077, 18407, 30889, 55221, 91103, 92667, 273309, 312919, 423361, 938757, 1270083, 7197137, 21591411]

約数ペア:

[(1, 21591411), (3, 7197137), (17, 1270083), (23, 938757), (51, 423361), (69, 312919), (79, 273309), (233, 92667), (237, 91103), (391, 55221), (699, 30889), (1173, 18407), (1343, 16077), (1817, 11883), (3961, 5451), (4029, 5359)]