21452020

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{26161}}^1$

素因数の和:26211

約数の個数: 24

約数和(自身を含む): 46149768

約数和(自身を除く): 24697748

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 26161, 52322, 104644, 130805, 261610, 523220, 1072601, 2145202, 4290404, 5363005, 10726010, 21452020]

約数ペア:

[(1, 21452020), (2, 10726010), (4, 5363005), (5, 4290404), (10, 2145202), (20, 1072601), (41, 523220), (82, 261610), (164, 130805), (205, 104644), (410, 52322), (820, 26161)]