12840009

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{6719}}^1$

素因数の和:6749

約数の個数: 24

約数和(自身を含む): 21450240

約数和(自身を除く): 8610231

約数列:

[1, 3, 7, 13, 21, 39, 49, 91, 147, 273, 637, 1911, 6719, 20157, 47033, 87347, 141099, 262041, 329231, 611429, 987693, 1834287, 4280003, 12840009]

約数ペア:

[(1, 12840009), (3, 4280003), (7, 1834287), (13, 987693), (21, 611429), (39, 329231), (49, 262041), (91, 141099), (147, 87347), (273, 47033), (637, 20157), (1911, 6719)]