81645260

素因数分解:

$2^2\times 5^1\times {\mathrm{1289}}^1\times {\mathrm{3167}}^1$

素因数の和:4465

約数の個数: 24

約数和(自身を含む): 171642240

約数和(自身を除く): 89996980

約数列:

[1, 2, 4, 5, 10, 20, 1289, 2578, 3167, 5156, 6334, 6445, 12668, 12890, 15835, 25780, 31670, 63340, 4082263, 8164526, 16329052, 20411315, 40822630, 81645260]

約数ペア:

[(1, 81645260), (2, 40822630), (4, 20411315), (5, 16329052), (10, 8164526), (20, 4082263), (1289, 63340), (2578, 31670), (3167, 25780), (5156, 15835), (6334, 12890), (6445, 12668)]