21039843

素因数分解:

$3^1\times {\mathrm{11}}^2\times {\mathrm{149}}^1\times {\mathrm{389}}^1$

素因数の和:563

約数の個数: 24

約数和(自身を含む): 31122000

約数和(自身を除く): 10082157

約数列:

[1, 3, 11, 33, 121, 149, 363, 389, 447, 1167, 1639, 4279, 4917, 12837, 18029, 47069, 54087, 57961, 141207, 173883, 637571, 1912713, 7013281, 21039843]

約数ペア:

[(1, 21039843), (3, 7013281), (11, 1912713), (33, 637571), (121, 173883), (149, 141207), (363, 57961), (389, 54087), (447, 47069), (1167, 18029), (1639, 12837), (4279, 4917)]