20492020

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{14431}}^1$

素因数の和:14511

約数の個数: 24

約数和(自身を含む): 43642368

約数和(自身を除く): 23150348

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 14431, 28862, 57724, 72155, 144310, 288620, 1024601, 2049202, 4098404, 5123005, 10246010, 20492020]

約数ペア:

[(1, 20492020), (2, 10246010), (4, 5123005), (5, 4098404), (10, 2049202), (20, 1024601), (71, 288620), (142, 144310), (284, 72155), (355, 57724), (710, 28862), (1420, 14431)]