21107620

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{25741}}^1$

素因数の和:25791

約数の個数: 24

約数和(自身を含む): 45408888

約数和(自身を除く): 24301268

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 25741, 51482, 102964, 128705, 257410, 514820, 1055381, 2110762, 4221524, 5276905, 10553810, 21107620]

約数ペア:

[(1, 21107620), (2, 10553810), (4, 5276905), (5, 4221524), (10, 2110762), (20, 1055381), (41, 514820), (82, 257410), (164, 128705), (205, 102964), (410, 51482), (820, 25741)]