21013018

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{11383}}^1$

素因数の和:11469

約数の個数: 16

約数和(自身を含む): 34425216

約数和(自身を除く): 13412198

約数列:

[1, 2, 13, 26, 71, 142, 923, 1846, 11383, 22766, 147979, 295958, 808193, 1616386, 10506509, 21013018]

約数ペア:

[(1, 21013018), (2, 10506509), (13, 1616386), (26, 808193), (71, 295958), (142, 147979), (923, 22766), (1846, 11383)]