19999265

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{337}}^1$

素因数の和:449

約数の個数: 32

約数和(自身を含む): 28619136

約数和(自身を除く): 8619871

約数列:

[1, 5, 11, 13, 55, 65, 83, 143, 337, 415, 715, 913, 1079, 1685, 3707, 4381, 4565, 5395, 11869, 18535, 21905, 27971, 48191, 59345, 139855, 240955, 307681, 363623, 1538405, 1818115, 3999853, 19999265]

約数ペア:

[(1, 19999265), (5, 3999853), (11, 1818115), (13, 1538405), (55, 363623), (65, 307681), (83, 240955), (143, 139855), (337, 59345), (415, 48191), (715, 27971), (913, 21905), (1079, 18535), (1685, 11869), (3707, 5395), (4381, 4565)]