21031386

素因数分解:

$2^1\times 3^1\times {\mathrm{43}}^1\times {\mathrm{81517}}^1$

素因数の和:81565

約数の個数: 16

約数和(自身を含む): 43041504

約数和(自身を除く): 22010118

約数列:

[1, 2, 3, 6, 43, 86, 129, 258, 81517, 163034, 244551, 489102, 3505231, 7010462, 10515693, 21031386]

約数ペア:

[(1, 21031386), (2, 10515693), (3, 7010462), (6, 3505231), (43, 489102), (86, 244551), (129, 163034), (258, 81517)]