19998

素因数分解:

$2^1\times 3^2\times {\mathrm{11}}^1\times {\mathrm{101}}^1$

素因数の和:120

約数の個数: 24

約数和(自身を含む): 47736

約数和(自身を除く): 27738

約数列:

[1, 2, 3, 6, 9, 11, 18, 22, 33, 66, 99, 101, 198, 202, 303, 606, 909, 1111, 1818, 2222, 3333, 6666, 9999, 19998]

約数ペア:

[(1, 19998), (2, 9999), (3, 6666), (6, 3333), (9, 2222), (11, 1818), (18, 1111), (22, 909), (33, 606), (66, 303), (99, 202), (101, 198)]