19999215

素因数分解:

$3^2\times 5^1\times {\mathrm{353}}^1\times {\mathrm{1259}}^1$

素因数の和:1623

約数の個数: 24

約数和(自身を含む): 34791120

約数和(自身を除く): 14791905

約数列:

[1, 3, 5, 9, 15, 45, 353, 1059, 1259, 1765, 3177, 3777, 5295, 6295, 11331, 15885, 18885, 56655, 444427, 1333281, 2222135, 3999843, 6666405, 19999215]

約数ペア:

[(1, 19999215), (3, 6666405), (5, 3999843), (9, 2222135), (15, 1333281), (45, 444427), (353, 56655), (1059, 18885), (1259, 15885), (1765, 11331), (3177, 6295), (3777, 5295)]