19781212

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{463}}^1\times {\mathrm{971}}^1$

素因数の和:1449

約数の個数: 24

約数和(自身を含む): 37884672

約数和(自身を除く): 18103460

約数列:

[1, 2, 4, 11, 22, 44, 463, 926, 971, 1852, 1942, 3884, 5093, 10186, 10681, 20372, 21362, 42724, 449573, 899146, 1798292, 4945303, 9890606, 19781212]

約数ペア:

[(1, 19781212), (2, 9890606), (4, 4945303), (11, 1798292), (22, 899146), (44, 449573), (463, 42724), (926, 21362), (971, 20372), (1852, 10681), (1942, 10186), (3884, 5093)]