20921407

素因数分解:

${\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{137}}^1\times {\mathrm{691}}^1$

素因数の和:858

約数の個数: 16

約数和(自身を含む): 24064992

約数和(自身を除く): 3143585

約数列:

[1, 13, 17, 137, 221, 691, 1781, 2329, 8983, 11747, 30277, 94667, 152711, 1230671, 1609339, 20921407]

約数ペア:

[(1, 20921407), (13, 1609339), (17, 1230671), (137, 152711), (221, 94667), (691, 30277), (1781, 11747), (2329, 8983)]