208919991

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{193}}^1\times {\mathrm{2713}}^1$

素因数の和:2935

約数の個数: 32

約数和(自身を含む): 336970240

約数和(自身を除く): 128050249

約数列:

[1, 3, 7, 19, 21, 57, 133, 193, 399, 579, 1351, 2713, 3667, 4053, 8139, 11001, 18991, 25669, 51547, 56973, 77007, 154641, 360829, 523609, 1082487, 1570827, 3665263, 9948571, 10995789, 29845713, 69639997, 208919991]

約数ペア:

[(1, 208919991), (3, 69639997), (7, 29845713), (19, 10995789), (21, 9948571), (57, 3665263), (133, 1570827), (193, 1082487), (399, 523609), (579, 360829), (1351, 154641), (2713, 77007), (3667, 56973), (4053, 51547), (8139, 25669), (11001, 18991)]