20181288968

素因数分解:

$2^3\times {\mathrm{21001}}^1\times {\mathrm{120121}}^1$

素因数の和:141128

約数の個数: 16

約数和(自身を含む): 37842033660

約数和(自身を除く): 17660744692

約数列:

[1, 2, 4, 8, 21001, 42002, 84004, 120121, 168008, 240242, 480484, 960968, 2522661121, 5045322242, 10090644484, 20181288968]

約数ペア:

[(1, 20181288968), (2, 10090644484), (4, 5045322242), (8, 2522661121), (21001, 960968), (42002, 480484), (84004, 240242), (120121, 168008)]