15991240

素因数分解:

$2^3\times 5^1\times {\mathrm{399781}}^1$

素因数の和:399792

約数の個数: 16

約数和(自身を含む): 35980380

約数和(自身を除く): 19989140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 399781, 799562, 1599124, 1998905, 3198248, 3997810, 7995620, 15991240]

約数ペア:

[(1, 15991240), (2, 7995620), (4, 3997810), (5, 3198248), (8, 1998905), (10, 1599124), (20, 799562), (40, 399781)]