20396575

素因数分解:

$5^2\times {\mathrm{89}}^2\times {\mathrm{103}}^1$

素因数の和:291

約数の個数: 18

約数和(自身を含む): 25827464

約数和(自身を除く): 5430889

約数列:

[1, 5, 25, 89, 103, 445, 515, 2225, 2575, 7921, 9167, 39605, 45835, 198025, 229175, 815863, 4079315, 20396575]

約数ペア:

[(1, 20396575), (5, 4079315), (25, 815863), (89, 229175), (103, 198025), (445, 45835), (515, 39605), (2225, 9167), (2575, 7921)]