20478913

素因数分解:

$7^2\times {\mathrm{13}}^2\times {\mathrm{2473}}^1$

素因数の和:2513

約数の個数: 18

約数和(自身を含む): 25806294

約数和(自身を除く): 5327381

約数列:

[1, 7, 13, 49, 91, 169, 637, 1183, 2473, 8281, 17311, 32149, 121177, 225043, 417937, 1575301, 2925559, 20478913]

約数ペア:

[(1, 20478913), (7, 2925559), (13, 1575301), (49, 417937), (91, 225043), (169, 121177), (637, 32149), (1183, 17311), (2473, 8281)]