210021

素因数分解:

$3^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{137}}^1$

素因数の和:220

約数の個数: 16

約数和(自身を含む): 326784

約数和(自身を除く): 116763

約数列:

[1, 3, 7, 21, 73, 137, 219, 411, 511, 959, 1533, 2877, 10001, 30003, 70007, 210021]

約数ペア:

[(1, 210021), (3, 70007), (7, 30003), (21, 10001), (73, 2877), (137, 1533), (219, 959), (411, 511)]