19992119

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{3907}}^1$

素因数の和:3974

約数の個数: 16

約数和(自身を含む): 24761088

約数和(自身を除く): 4768969

約数列:

[1, 7, 17, 43, 119, 301, 731, 3907, 5117, 27349, 66419, 168001, 464933, 1176007, 2856017, 19992119]

約数ペア:

[(1, 19992119), (7, 2856017), (17, 1176007), (43, 464933), (119, 168001), (301, 66419), (731, 27349), (3907, 5117)]