21328218

素因数分解:

$2^1\times 3^3\times {\mathrm{394967}}^1$

素因数の和:394978

約数の個数: 16

約数和(自身を含む): 47396160

約数和(自身を除く): 26067942

約数列:

[1, 2, 3, 6, 9, 18, 27, 54, 394967, 789934, 1184901, 2369802, 3554703, 7109406, 10664109, 21328218]

約数ペア:

[(1, 21328218), (2, 10664109), (3, 7109406), (6, 3554703), (9, 2369802), (18, 1184901), (27, 789934), (54, 394967)]