21605311

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{1733}}^1$

素因数の和:1890

約数の個数: 16

約数和(自身を含む): 26800704

約数和(自身を除く): 5195393

約数列:

[1, 7, 13, 91, 137, 959, 1733, 1781, 12131, 12467, 22529, 157703, 237421, 1661947, 3086473, 21605311]

約数ペア:

[(1, 21605311), (7, 3086473), (13, 1661947), (91, 237421), (137, 157703), (959, 22529), (1733, 12467), (1781, 12131)]