21081897

素因数分解:

$3^3\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{449}}^1$

素因数の和:542

約数の個数: 32

約数和(自身を含む): 32832000

約数和(自身を除く): 11750103

約数列:

[1, 3, 9, 27, 37, 47, 111, 141, 333, 423, 449, 999, 1269, 1347, 1739, 4041, 5217, 12123, 15651, 16613, 21103, 46953, 49839, 63309, 149517, 189927, 448551, 569781, 780811, 2342433, 7027299, 21081897]

約数ペア:

[(1, 21081897), (3, 7027299), (9, 2342433), (27, 780811), (37, 569781), (47, 448551), (111, 189927), (141, 149517), (333, 63309), (423, 49839), (449, 46953), (999, 21103), (1269, 16613), (1347, 15651), (1739, 12123), (4041, 5217)]