21920379

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{18131}}^1$

素因数の和:18178

約数の個数: 16

約数和(自身を含む): 32492544

約数和(自身を除く): 10572165

約数列:

[1, 3, 13, 31, 39, 93, 403, 1209, 18131, 54393, 235703, 562061, 707109, 1686183, 7306793, 21920379]

約数ペア:

[(1, 21920379), (3, 7306793), (13, 1686183), (31, 707109), (39, 562061), (93, 235703), (403, 54393), (1209, 18131)]