19993905

素因数分解:

$3^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{5107}}^1$

素因数の和:5150

約数の個数: 32

約数和(自身を含む): 36777600

約数和(自身を除く): 16783695

約数列:

[1, 3, 5, 9, 15, 27, 29, 45, 87, 135, 145, 261, 435, 783, 1305, 3915, 5107, 15321, 25535, 45963, 76605, 137889, 148103, 229815, 444309, 689445, 740515, 1332927, 2221545, 3998781, 6664635, 19993905]

約数ペア:

[(1, 19993905), (3, 6664635), (5, 3998781), (9, 2221545), (15, 1332927), (27, 740515), (29, 689445), (45, 444309), (87, 229815), (135, 148103), (145, 137889), (261, 76605), (435, 45963), (783, 25535), (1305, 15321), (3915, 5107)]