20815700

素因数分解:

$2^2\times 5^2\times {\mathrm{41}}^1\times {\mathrm{5077}}^1$

素因数の和:5132

約数の個数: 36

約数和(自身を含む): 46280892

約数和(自身を除く): 25465192

約数列:

[1, 2, 4, 5, 10, 20, 25, 41, 50, 82, 100, 164, 205, 410, 820, 1025, 2050, 4100, 5077, 10154, 20308, 25385, 50770, 101540, 126925, 208157, 253850, 416314, 507700, 832628, 1040785, 2081570, 4163140, 5203925, 10407850, 20815700]

約数ペア:

[(1, 20815700), (2, 10407850), (4, 5203925), (5, 4163140), (10, 2081570), (20, 1040785), (25, 832628), (41, 507700), (50, 416314), (82, 253850), (100, 208157), (164, 126925), (205, 101540), (410, 50770), (820, 25385), (1025, 20308), (2050, 10154), (4100, 5077)]