20398870

素因数分解:

$2^1\times 5^1\times {\mathrm{401}}^1\times {\mathrm{5087}}^1$

素因数の和:5495

約数の個数: 16

約数和(自身を含む): 36816768

約数和(自身を除く): 16417898

約数列:

[1, 2, 5, 10, 401, 802, 2005, 4010, 5087, 10174, 25435, 50870, 2039887, 4079774, 10199435, 20398870]

約数ペア:

[(1, 20398870), (2, 10199435), (5, 4079774), (10, 2039887), (401, 50870), (802, 25435), (2005, 10174), (4010, 5087)]