20997201

素因数分解:

$3^1\times {\mathrm{43}}^1\times {\mathrm{139}}^1\times {\mathrm{1171}}^1$

素因数の和:1356

約数の個数: 16

約数和(自身を含む): 28878080

約数和(自身を除く): 7880879

約数列:

[1, 3, 43, 129, 139, 417, 1171, 3513, 5977, 17931, 50353, 151059, 162769, 488307, 6999067, 20997201]

約数ペア:

[(1, 20997201), (3, 6999067), (43, 488307), (129, 162769), (139, 151059), (417, 50353), (1171, 17931), (3513, 5977)]