21485781

素因数分解:

$3^2\times {\mathrm{29}}^1\times {\mathrm{191}}^1\times {\mathrm{431}}^1$

素因数の和:657

約数の個数: 24

約数和(自身を含む): 32348160

約数和(自身を除く): 10862379

約数列:

[1, 3, 9, 29, 87, 191, 261, 431, 573, 1293, 1719, 3879, 5539, 12499, 16617, 37497, 49851, 82321, 112491, 246963, 740889, 2387309, 7161927, 21485781]

約数ペア:

[(1, 21485781), (3, 7161927), (9, 2387309), (29, 740889), (87, 246963), (191, 112491), (261, 82321), (431, 49851), (573, 37497), (1293, 16617), (1719, 12499), (3879, 5539)]