21421328

素因数分解:

$2^4\times {\mathrm{53}}^1\times {\mathrm{25261}}^1$

素因数の和:25322

約数の個数: 20

約数和(自身を含む): 42288588

約数和(自身を除く): 20867260

約数列:

[1, 2, 4, 8, 16, 53, 106, 212, 424, 848, 25261, 50522, 101044, 202088, 404176, 1338833, 2677666, 5355332, 10710664, 21421328]

約数ペア:

[(1, 21421328), (2, 10710664), (4, 5355332), (8, 2677666), (16, 1338833), (53, 404176), (106, 202088), (212, 101044), (424, 50522), (848, 25261)]