20978601

素因数分解:

$3^1\times 7^1\times {\mathrm{709}}^1\times {\mathrm{1409}}^1$

素因数の和:2128

約数の個数: 16

約数和(自身を含む): 32035200

約数和(自身を除く): 11056599

約数列:

[1, 3, 7, 21, 709, 1409, 2127, 4227, 4963, 9863, 14889, 29589, 998981, 2996943, 6992867, 20978601]

約数ペア:

[(1, 20978601), (3, 6992867), (7, 2996943), (21, 998981), (709, 29589), (1409, 14889), (2127, 9863), (4227, 4963)]