20640921

素因数分解:

$3^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{10133}}^1$

素因数の和:10240

約数の個数: 16

約数和(自身を含む): 31780224

約数和(自身を除く): 11139303

約数列:

[1, 3, 7, 21, 97, 291, 679, 2037, 10133, 30399, 70931, 212793, 982901, 2948703, 6880307, 20640921]

約数ペア:

[(1, 20640921), (3, 6880307), (7, 2948703), (21, 982901), (97, 212793), (291, 70931), (679, 30399), (2037, 10133)]