19978156

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{349}}^1\times {\mathrm{1301}}^1$

素因数の和:1665

約数の個数: 24

約数和(自身を含む): 38278800

約数和(自身を除く): 18300644

約数列:

[1, 2, 4, 11, 22, 44, 349, 698, 1301, 1396, 2602, 3839, 5204, 7678, 14311, 15356, 28622, 57244, 454049, 908098, 1816196, 4994539, 9989078, 19978156]

約数ペア:

[(1, 19978156), (2, 9989078), (4, 4994539), (11, 1816196), (22, 908098), (44, 454049), (349, 57244), (698, 28622), (1301, 15356), (1396, 14311), (2602, 7678), (3839, 5204)]