20878100

素因数分解:

$2^2\times 5^2\times {\mathrm{103}}^1\times {\mathrm{2027}}^1$

素因数の和:2144

約数の個数: 36

約数和(自身を含む): 45767904

約数和(自身を除く): 24889804

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 103, 206, 412, 515, 1030, 2027, 2060, 2575, 4054, 5150, 8108, 10135, 10300, 20270, 40540, 50675, 101350, 202700, 208781, 417562, 835124, 1043905, 2087810, 4175620, 5219525, 10439050, 20878100]

約数ペア:

[(1, 20878100), (2, 10439050), (4, 5219525), (5, 4175620), (10, 2087810), (20, 1043905), (25, 835124), (50, 417562), (100, 208781), (103, 202700), (206, 101350), (412, 50675), (515, 40540), (1030, 20270), (2027, 10300), (2060, 10135), (2575, 8108), (4054, 5150)]