19915707

素因数分解:

$3^1\times 7^2\times {\mathrm{61}}^1\times {\mathrm{2221}}^1$

素因数の和:2299

約数の個数: 24

約数和(自身を含む): 31410192

約数和(自身を除く): 11494485

約数列:

[1, 3, 7, 21, 49, 61, 147, 183, 427, 1281, 2221, 2989, 6663, 8967, 15547, 46641, 108829, 135481, 326487, 406443, 948367, 2845101, 6638569, 19915707]

約数ペア:

[(1, 19915707), (3, 6638569), (7, 2845101), (21, 948367), (49, 406443), (61, 326487), (147, 135481), (183, 108829), (427, 46641), (1281, 15547), (2221, 8967), (2989, 6663)]