21395718

素因数分解:

$2^1\times 3^3\times {\mathrm{396217}}^1$

素因数の和:396228

約数の個数: 16

約数和(自身を含む): 47546160

約数和(自身を除く): 26150442

約数列:

[1, 2, 3, 6, 9, 18, 27, 54, 396217, 792434, 1188651, 2377302, 3565953, 7131906, 10697859, 21395718]

約数ペア:

[(1, 21395718), (2, 10697859), (3, 7131906), (6, 3565953), (9, 2377302), (18, 1188651), (27, 792434), (54, 396217)]