20178315

素因数分解:

$3^4\times 5^1\times {\mathrm{49823}}^1$

素因数の和:49840

約数の個数: 20

約数和(自身を含む): 36172224

約数和(自身を除く): 15993909

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 49823, 149469, 249115, 448407, 747345, 1345221, 2242035, 4035663, 6726105, 20178315]

約数ペア:

[(1, 20178315), (3, 6726105), (5, 4035663), (9, 2242035), (15, 1345221), (27, 747345), (45, 448407), (81, 249115), (135, 149469), (405, 49823)]