21282993

素因数分解:

$3^4\times {\mathrm{103}}^1\times {\mathrm{2551}}^1$

素因数の和:2666

約数の個数: 20

約数和(自身を含む): 32114368

約数和(自身を除く): 10831375

約数列:

[1, 3, 9, 27, 81, 103, 309, 927, 2551, 2781, 7653, 8343, 22959, 68877, 206631, 262753, 788259, 2364777, 7094331, 21282993]

約数ペア:

[(1, 21282993), (3, 7094331), (9, 2364777), (27, 788259), (81, 262753), (103, 206631), (309, 68877), (927, 22959), (2551, 8343), (2781, 7653)]