20440978

素因数分解:

$2^1\times {\mathrm{61}}^1\times {\mathrm{131}}^1\times {\mathrm{1279}}^1$

素因数の和:1473

約数の個数: 16

約数和(自身を含む): 31426560

約数和(自身を除く): 10985582

約数列:

[1, 2, 61, 122, 131, 262, 1279, 2558, 7991, 15982, 78019, 156038, 167549, 335098, 10220489, 20440978]

約数ペア:

[(1, 20440978), (2, 10220489), (61, 335098), (122, 167549), (131, 156038), (262, 78019), (1279, 15982), (2558, 7991)]