800000020

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{754717}}^1$

素因数の和:754779

約数の個数: 24

約数和(自身を含む): 1711700424

約数和(自身を除く): 911700404

約数列:

[1, 2, 4, 5, 10, 20, 53, 106, 212, 265, 530, 1060, 754717, 1509434, 3018868, 3773585, 7547170, 15094340, 40000001, 80000002, 160000004, 200000005, 400000010, 800000020]

約数ペア:

[(1, 800000020), (2, 400000010), (4, 200000005), (5, 160000004), (10, 80000002), (20, 40000001), (53, 15094340), (106, 7547170), (212, 3773585), (265, 3018868), (530, 1509434), (1060, 754717)]