18021997

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{149}}^1\times {\mathrm{467}}^1$

素因数の和:660

約数の個数: 16

約数和(自身を含む): 21340800

約数和(自身を除く): 3318803

約数列:

[1, 7, 37, 149, 259, 467, 1043, 3269, 5513, 17279, 38591, 69583, 120953, 487081, 2574571, 18021997]

約数ペア:

[(1, 18021997), (7, 2574571), (37, 487081), (149, 120953), (259, 69583), (467, 38591), (1043, 17279), (3269, 5513)]