20907801

素因数分解:

$3^4\times {\mathrm{359}}^1\times {\mathrm{719}}^1$

素因数の和:1090

約数の個数: 20

約数和(自身を含む): 31363200

約数和(自身を除く): 10455399

約数列:

[1, 3, 9, 27, 81, 359, 719, 1077, 2157, 3231, 6471, 9693, 19413, 29079, 58239, 258121, 774363, 2323089, 6969267, 20907801]

約数ペア:

[(1, 20907801), (3, 6969267), (9, 2323089), (27, 774363), (81, 258121), (359, 58239), (719, 29079), (1077, 19413), (2157, 9693), (3231, 6471)]