21578211

素因数分解:

$3^3\times {\mathrm{401}}^1\times {\mathrm{1993}}^1$

素因数の和:2403

約数の個数: 16

約数和(自身を含む): 32063520

約数和(自身を除く): 10485309

約数列:

[1, 3, 9, 27, 401, 1203, 1993, 3609, 5979, 10827, 17937, 53811, 799193, 2397579, 7192737, 21578211]

約数ペア:

[(1, 21578211), (3, 7192737), (9, 2397579), (27, 799193), (401, 53811), (1203, 17937), (1993, 10827), (3609, 5979)]