21621519

素因数分解:

$3^3\times {\mathrm{401}}^1\times {\mathrm{1997}}^1$

素因数の和:2407

約数の個数: 16

約数和(自身を含む): 32127840

約数和(自身を除く): 10506321

約数列:

[1, 3, 9, 27, 401, 1203, 1997, 3609, 5991, 10827, 17973, 53919, 800797, 2402391, 7207173, 21621519]

約数ペア:

[(1, 21621519), (3, 7207173), (9, 2402391), (27, 800797), (401, 53919), (1203, 17973), (1997, 10827), (3609, 5991)]