19787495

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{277}}^1$

素因数の和:459

約数の個数: 32

約数和(自身を含む): 29516928

約数和(自身を除く): 9729433

約数列:

[1, 5, 7, 13, 35, 65, 91, 157, 277, 455, 785, 1099, 1385, 1939, 2041, 3601, 5495, 9695, 10205, 14287, 18005, 25207, 43489, 71435, 126035, 217445, 304423, 565357, 1522115, 2826785, 3957499, 19787495]

約数ペア:

[(1, 19787495), (5, 3957499), (7, 2826785), (13, 1522115), (35, 565357), (65, 304423), (91, 217445), (157, 126035), (277, 71435), (455, 43489), (785, 25207), (1099, 18005), (1385, 14287), (1939, 10205), (2041, 9695), (3601, 5495)]