21397539

素因数分解:

$3^1\times {\mathrm{107}}^1\times {\mathrm{191}}^1\times {\mathrm{349}}^1$

素因数の和:650

約数の個数: 16

約数和(自身を含む): 29030400

約数和(自身を除く): 7632861

約数列:

[1, 3, 107, 191, 321, 349, 573, 1047, 20437, 37343, 61311, 66659, 112029, 199977, 7132513, 21397539]

約数ペア:

[(1, 21397539), (3, 7132513), (107, 199977), (191, 112029), (321, 66659), (349, 61311), (573, 37343), (1047, 20437)]