20139640

素因数分解:

$2^3\times 5^1\times {\mathrm{499}}^1\times {\mathrm{1009}}^1$

素因数の和:1519

約数の個数: 32

約数和(自身を含む): 45450000

約数和(自身を除く): 25310360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 499, 998, 1009, 1996, 2018, 2495, 3992, 4036, 4990, 5045, 8072, 9980, 10090, 19960, 20180, 40360, 503491, 1006982, 2013964, 2517455, 4027928, 5034910, 10069820, 20139640]

約数ペア:

[(1, 20139640), (2, 10069820), (4, 5034910), (5, 4027928), (8, 2517455), (10, 2013964), (20, 1006982), (40, 503491), (499, 40360), (998, 20180), (1009, 19960), (1996, 10090), (2018, 9980), (2495, 8072), (3992, 5045), (4036, 4990)]