21778479

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{137}}^1\times {\mathrm{1039}}^1$

素因数の和:1199

約数の個数: 24

約数和(自身を含む): 33583680

約数和(自身を除く): 11805201

約数列:

[1, 3, 9, 17, 51, 137, 153, 411, 1039, 1233, 2329, 3117, 6987, 9351, 17663, 20961, 52989, 142343, 158967, 427029, 1281087, 2419831, 7259493, 21778479]

約数ペア:

[(1, 21778479), (3, 7259493), (9, 2419831), (17, 1281087), (51, 427029), (137, 158967), (153, 142343), (411, 52989), (1039, 20961), (1233, 17663), (2329, 9351), (3117, 6987)]