20999901

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{421}}^1\times {\mathrm{1279}}^1$

素因数の和:1716

約数の個数: 16

約数和(自身を含む): 30248960

約数和(自身を除く): 9249059

約数列:

[1, 3, 13, 39, 421, 1263, 1279, 3837, 5473, 16419, 16627, 49881, 538459, 1615377, 6999967, 20999901]

約数ペア:

[(1, 20999901), (3, 6999967), (13, 1615377), (39, 538459), (421, 49881), (1263, 16627), (1279, 16419), (3837, 5473)]