21030321

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{281}}^1$

素因数の和:417

約数の個数: 32

約数和(自身を含む): 32215680

約数和(自身を除く): 11185359

約数列:

[1, 3, 13, 19, 39, 57, 101, 247, 281, 303, 741, 843, 1313, 1919, 3653, 3939, 5339, 5757, 10959, 16017, 24947, 28381, 69407, 74841, 85143, 208221, 368953, 539239, 1106859, 1617717, 7010107, 21030321]

約数ペア:

[(1, 21030321), (3, 7010107), (13, 1617717), (19, 1106859), (39, 539239), (57, 368953), (101, 208221), (247, 85143), (281, 74841), (303, 69407), (741, 28381), (843, 24947), (1313, 16017), (1919, 10959), (3653, 5757), (3939, 5339)]