19986505

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{51913}}^1$

素因数の和:51936

約数の個数: 16

約数和(自身を含む): 29902464

約数和(自身を除く): 9915959

約数列:

[1, 5, 7, 11, 35, 55, 77, 385, 51913, 259565, 363391, 571043, 1816955, 2855215, 3997301, 19986505]

約数ペア:

[(1, 19986505), (5, 3997301), (7, 2855215), (11, 1816955), (35, 571043), (55, 363391), (77, 259565), (385, 51913)]