19201721

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{14669}}^1$

素因数の和:14704

約数の個数: 16

約数和(自身を含む): 25349760

約数和(自身を除く): 6148039

約数列:

[1, 7, 11, 17, 77, 119, 187, 1309, 14669, 102683, 161359, 249373, 1129513, 1745611, 2743103, 19201721]

約数ペア:

[(1, 19201721), (7, 2743103), (11, 1745611), (17, 1129513), (77, 249373), (119, 161359), (187, 102683), (1309, 14669)]