20705307

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{51893}}^1$

素因数の和:51922

約数の個数: 16

約数和(自身を含む): 33212160

約数和(自身を除く): 12506853

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 51893, 155679, 363251, 985967, 1089753, 2957901, 6901769, 20705307]

約数ペア:

[(1, 20705307), (3, 6901769), (7, 2957901), (19, 1089753), (21, 985967), (57, 363251), (133, 155679), (399, 51893)]