28385217

素因数分解:

$3^2\times 7^1\times {\mathrm{349}}^1\times {\mathrm{1291}}^1$

素因数の和:1653

約数の個数: 24

約数和(自身を含む): 47028800

約数和(自身を除く): 18643583

約数列:

[1, 3, 7, 9, 21, 63, 349, 1047, 1291, 2443, 3141, 3873, 7329, 9037, 11619, 21987, 27111, 81333, 450559, 1351677, 3153913, 4055031, 9461739, 28385217]

約数ペア:

[(1, 28385217), (3, 9461739), (7, 4055031), (9, 3153913), (21, 1351677), (63, 450559), (349, 81333), (1047, 27111), (1291, 21987), (2443, 11619), (3141, 9037), (3873, 7329)]