18919912

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{12647}}^1$

素因数の和:12681

約数の個数: 32

約数和(自身を含む): 40979520

約数和(自身を除く): 22059608

約数列:

[1, 2, 4, 8, 11, 17, 22, 34, 44, 68, 88, 136, 187, 374, 748, 1496, 12647, 25294, 50588, 101176, 139117, 214999, 278234, 429998, 556468, 859996, 1112936, 1719992, 2364989, 4729978, 9459956, 18919912]

約数ペア:

[(1, 18919912), (2, 9459956), (4, 4729978), (8, 2364989), (11, 1719992), (17, 1112936), (22, 859996), (34, 556468), (44, 429998), (68, 278234), (88, 214999), (136, 139117), (187, 101176), (374, 50588), (748, 25294), (1496, 12647)]