20989633

素因数分解:

$7^1\times {\mathrm{43}}^1\times {\mathrm{137}}^1\times {\mathrm{509}}^1$

素因数の和:696

約数の個数: 16

約数和(自身を含む): 24773760

約数和(自身を除く): 3784127

約数列:

[1, 7, 43, 137, 301, 509, 959, 3563, 5891, 21887, 41237, 69733, 153209, 488131, 2998519, 20989633]

約数ペア:

[(1, 20989633), (7, 2998519), (43, 488131), (137, 153209), (301, 69733), (509, 41237), (959, 21887), (3563, 5891)]