19665

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1$

素因数の和:53

約数の個数: 24

約数和(自身を含む): 37440

約数和(自身を除く): 17775

約数列:

[1, 3, 5, 9, 15, 19, 23, 45, 57, 69, 95, 115, 171, 207, 285, 345, 437, 855, 1035, 1311, 2185, 3933, 6555, 19665]

約数ペア:

[(1, 19665), (3, 6555), (5, 3933), (9, 2185), (15, 1311), (19, 1035), (23, 855), (45, 437), (57, 345), (69, 285), (95, 207), (115, 171)]