20428857

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{193}}^1\times {\mathrm{619}}^1$

素因数の和:837

約数の個数: 24

約数和(自身を含む): 31272800

約数和(自身を除く): 10843943

約数列:

[1, 3, 9, 19, 57, 171, 193, 579, 619, 1737, 1857, 3667, 5571, 11001, 11761, 33003, 35283, 105849, 119467, 358401, 1075203, 2269873, 6809619, 20428857]

約数ペア:

[(1, 20428857), (3, 6809619), (9, 2269873), (19, 1075203), (57, 358401), (171, 119467), (193, 105849), (579, 35283), (619, 33003), (1737, 11761), (1857, 11001), (3667, 5571)]