20653821

素因数分解:

$3^2\times {\mathrm{47}}^1\times {\mathrm{157}}^1\times {\mathrm{311}}^1$

素因数の和:521

約数の個数: 24

約数和(自身を含む): 30760704

約数和(自身を除く): 10106883

約数列:

[1, 3, 9, 47, 141, 157, 311, 423, 471, 933, 1413, 2799, 7379, 14617, 22137, 43851, 48827, 66411, 131553, 146481, 439443, 2294869, 6884607, 20653821]

約数ペア:

[(1, 20653821), (3, 6884607), (9, 2294869), (47, 439443), (141, 146481), (157, 131553), (311, 66411), (423, 48827), (471, 43851), (933, 22137), (1413, 14617), (2799, 7379)]