81091480

素因数分解:

$2^3\times 5^1\times {\mathrm{661}}^1\times {\mathrm{3067}}^1$

素因数の和:3739

約数の個数: 32

約数和(自身を含む): 182791440

約数和(自身を除く): 101699960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 661, 1322, 2644, 3067, 3305, 5288, 6134, 6610, 12268, 13220, 15335, 24536, 26440, 30670, 61340, 122680, 2027287, 4054574, 8109148, 10136435, 16218296, 20272870, 40545740, 81091480]

約数ペア:

[(1, 81091480), (2, 40545740), (4, 20272870), (5, 16218296), (8, 10136435), (10, 8109148), (20, 4054574), (40, 2027287), (661, 122680), (1322, 61340), (2644, 30670), (3067, 26440), (3305, 24536), (5288, 15335), (6134, 13220), (6610, 12268)]