20866815

素因数分解:

$3^4\times 5^1\times {\mathrm{67}}^1\times {\mathrm{769}}^1$

素因数の和:853

約数の個数: 40

約数和(自身を含む): 38013360

約数和(自身を除く): 17146545

約数列:

[1, 3, 5, 9, 15, 27, 45, 67, 81, 135, 201, 335, 405, 603, 769, 1005, 1809, 2307, 3015, 3845, 5427, 6921, 9045, 11535, 20763, 27135, 34605, 51523, 62289, 103815, 154569, 257615, 311445, 463707, 772845, 1391121, 2318535, 4173363, 6955605, 20866815]

約数ペア:

[(1, 20866815), (3, 6955605), (5, 4173363), (9, 2318535), (15, 1391121), (27, 772845), (45, 463707), (67, 311445), (81, 257615), (135, 154569), (201, 103815), (335, 62289), (405, 51523), (603, 34605), (769, 27135), (1005, 20763), (1809, 11535), (2307, 9045), (3015, 6921), (3845, 5427)]