20011845

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{1433}}^1$

素因数の和:1474

約数の個数: 48

約数和(自身を含む): 39234240

約数和(自身を除く): 19222395

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 49, 57, 95, 105, 133, 147, 245, 285, 399, 665, 735, 931, 1433, 1995, 2793, 4299, 4655, 7165, 10031, 13965, 21495, 27227, 30093, 50155, 70217, 81681, 136135, 150465, 190589, 210651, 351085, 408405, 571767, 952945, 1053255, 1334123, 2858835, 4002369, 6670615, 20011845]

約数ペア:

[(1, 20011845), (3, 6670615), (5, 4002369), (7, 2858835), (15, 1334123), (19, 1053255), (21, 952945), (35, 571767), (49, 408405), (57, 351085), (95, 210651), (105, 190589), (133, 150465), (147, 136135), (245, 81681), (285, 70217), (399, 50155), (665, 30093), (735, 27227), (931, 21495), (1433, 13965), (1995, 10031), (2793, 7165), (4299, 4655)]