128789999

素因数分解:

${\mathrm{13}}^2\times {\mathrm{19}}^2\times {\mathrm{2111}}^1$

素因数の和:2175

約数の個数: 18

約数和(自身を含む): 147254976

約数和(自身を除く): 18464977

約数列:

[1, 13, 19, 169, 247, 361, 2111, 3211, 4693, 27443, 40109, 61009, 356759, 521417, 762071, 6778421, 9906923, 128789999]

約数ペア:

[(1, 128789999), (13, 9906923), (19, 6778421), (169, 762071), (247, 521417), (361, 356759), (2111, 61009), (3211, 40109), (4693, 27443)]