20845503

素因数分解:

$3^2\times 7^1\times {\mathrm{409}}^1\times {\mathrm{809}}^1$

素因数の和:1231

約数の個数: 24

約数和(自身を含む): 34538400

約数和(自身を除く): 13692897

約数列:

[1, 3, 7, 9, 21, 63, 409, 809, 1227, 2427, 2863, 3681, 5663, 7281, 8589, 16989, 25767, 50967, 330881, 992643, 2316167, 2977929, 6948501, 20845503]

約数ペア:

[(1, 20845503), (3, 6948501), (7, 2977929), (9, 2316167), (21, 992643), (63, 330881), (409, 50967), (809, 25767), (1227, 16989), (2427, 8589), (2863, 7281), (3681, 5663)]