638862020

素因数分解:

$2^2\times 5^1\times {\mathrm{1321}}^1\times {\mathrm{24181}}^1$

素因数の和:25511

約数の個数: 24

約数和(自身を含む): 1342681368

約数和(自身を除く): 703819348

約数列:

[1, 2, 4, 5, 10, 20, 1321, 2642, 5284, 6605, 13210, 24181, 26420, 48362, 96724, 120905, 241810, 483620, 31943101, 63886202, 127772404, 159715505, 319431010, 638862020]

約数ペア:

[(1, 638862020), (2, 319431010), (4, 159715505), (5, 127772404), (10, 63886202), (20, 31943101), (1321, 483620), (2642, 241810), (5284, 120905), (6605, 96724), (13210, 48362), (24181, 26420)]