21211071

素因数分解:

$3^1\times 7^2\times {\mathrm{313}}^1\times {\mathrm{461}}^1$

素因数の和:791

約数の個数: 24

約数和(自身を含む): 33075504

約数和(自身を除く): 11864433

約数列:

[1, 3, 7, 21, 49, 147, 313, 461, 939, 1383, 2191, 3227, 6573, 9681, 15337, 22589, 46011, 67767, 144293, 432879, 1010051, 3030153, 7070357, 21211071]

約数ペア:

[(1, 21211071), (3, 7070357), (7, 3030153), (21, 1010051), (49, 432879), (147, 144293), (313, 67767), (461, 46011), (939, 22589), (1383, 15337), (2191, 9681), (3227, 6573)]