640640374

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{288317}}^1$

素因数の和:288431

約数の個数: 16

約数和(自身を含む): 1058703696

約数和(自身を除く): 418063322

約数列:

[1, 2, 11, 22, 101, 202, 1111, 2222, 288317, 576634, 3171487, 6342974, 29120017, 58240034, 320320187, 640640374]

約数ペア:

[(1, 640640374), (2, 320320187), (11, 58240034), (22, 29120017), (101, 6342974), (202, 3171487), (1111, 576634), (2222, 288317)]