20163981

素因数分解:

$3^1\times {\mathrm{31}}^1\times {\mathrm{157}}^1\times {\mathrm{1381}}^1$

素因数の和:1572

約数の個数: 16

約数和(自身を含む): 27949568

約数和(自身を除く): 7785587

約数列:

[1, 3, 31, 93, 157, 471, 1381, 4143, 4867, 14601, 42811, 128433, 216817, 650451, 6721327, 20163981]

約数ペア:

[(1, 20163981), (3, 6721327), (31, 650451), (93, 216817), (157, 128433), (471, 42811), (1381, 14601), (4143, 4867)]