20815706680

素因数分解:

$2^3\times 5^1\times {\mathrm{520392667}}^1$

素因数の和:520392678

約数の個数: 16

約数和(自身を含む): 46835340120

約数和(自身を除く): 26019633440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 520392667, 1040785334, 2081570668, 2601963335, 4163141336, 5203926670, 10407853340, 20815706680]

約数ペア:

[(1, 20815706680), (2, 10407853340), (4, 5203926670), (5, 4163141336), (8, 2601963335), (10, 2081570668), (20, 1040785334), (40, 520392667)]