28905639

素因数分解:

$3^1\times 7^4\times {\mathrm{4013}}^1$

素因数の和:4044

約数の個数: 20

約数和(自身を含む): 44972856

約数和(自身を除く): 16067217

約数列:

[1, 3, 7, 21, 49, 147, 343, 1029, 2401, 4013, 7203, 12039, 28091, 84273, 196637, 589911, 1376459, 4129377, 9635213, 28905639]

約数ペア:

[(1, 28905639), (3, 9635213), (7, 4129377), (21, 1376459), (49, 589911), (147, 196637), (343, 84273), (1029, 28091), (2401, 12039), (4013, 7203)]