20989905

素因数分解:

$3^1\times 5^1\times {\mathrm{79}}^1\times {\mathrm{17713}}^1$

素因数の和:17800

約数の個数: 16

約数和(自身を含む): 34010880

約数和(自身を除く): 13020975

約数列:

[1, 3, 5, 15, 79, 237, 395, 1185, 17713, 53139, 88565, 265695, 1399327, 4197981, 6996635, 20989905]

約数ペア:

[(1, 20989905), (3, 6996635), (5, 4197981), (15, 1399327), (79, 265695), (237, 88565), (395, 53139), (1185, 17713)]