20904130

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{401}}^2$

素因数の和:822

約数の個数: 24

約数和(自身を含む): 40623156

約数和(自身を除く): 19719026

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 401, 802, 2005, 4010, 5213, 10426, 26065, 52130, 160801, 321602, 804005, 1608010, 2090413, 4180826, 10452065, 20904130]

約数ペア:

[(1, 20904130), (2, 10452065), (5, 4180826), (10, 2090413), (13, 1608010), (26, 804005), (65, 321602), (130, 160801), (401, 52130), (802, 26065), (2005, 10426), (4010, 5213)]