399903

素因数分解:

$3^1\times 7^1\times {\mathrm{137}}^1\times {\mathrm{139}}^1$

素因数の和:286

約数の個数: 16

約数和(自身を含む): 618240

約数和(自身を除く): 218337

約数列:

[1, 3, 7, 21, 137, 139, 411, 417, 959, 973, 2877, 2919, 19043, 57129, 133301, 399903]

約数ペア:

[(1, 399903), (3, 133301), (7, 57129), (21, 19043), (137, 2919), (139, 2877), (411, 973), (417, 959)]