21869810

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^2\times {\mathrm{1301}}^1$

素因数の和:1390

約数の個数: 24

約数和(自身を含む): 40380228

約数和(自身を除く): 18510418

約数列:

[1, 2, 5, 10, 41, 82, 205, 410, 1301, 1681, 2602, 3362, 6505, 8405, 13010, 16810, 53341, 106682, 266705, 533410, 2186981, 4373962, 10934905, 21869810]

約数ペア:

[(1, 21869810), (2, 10934905), (5, 4373962), (10, 2186981), (41, 533410), (82, 266705), (205, 106682), (410, 53341), (1301, 16810), (1681, 13010), (2602, 8405), (3362, 6505)]