20937904

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{2341}}^1$

素因数の和:2405

約数の個数: 40

約数和(自身を含む): 44722832

約数和(自身を除く): 23784928

約数列:

[1, 2, 4, 8, 13, 16, 26, 43, 52, 86, 104, 172, 208, 344, 559, 688, 1118, 2236, 2341, 4472, 4682, 8944, 9364, 18728, 30433, 37456, 60866, 100663, 121732, 201326, 243464, 402652, 486928, 805304, 1308619, 1610608, 2617238, 5234476, 10468952, 20937904]

約数ペア:

[(1, 20937904), (2, 10468952), (4, 5234476), (8, 2617238), (13, 1610608), (16, 1308619), (26, 805304), (43, 486928), (52, 402652), (86, 243464), (104, 201326), (172, 121732), (208, 100663), (344, 60866), (559, 37456), (688, 30433), (1118, 18728), (2236, 9364), (2341, 8944), (4472, 4682)]