21240549

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{769}}^1$

素因数の和:823

約数の個数: 40

約数和(自身を含む): 35777280

約数和(自身を除く): 14536731

約数列:

[1, 3, 9, 11, 27, 31, 33, 81, 93, 99, 279, 297, 341, 769, 837, 891, 1023, 2307, 2511, 3069, 6921, 8459, 9207, 20763, 23839, 25377, 27621, 62289, 71517, 76131, 214551, 228393, 262229, 643653, 685179, 786687, 1930959, 2360061, 7080183, 21240549]

約数ペア:

[(1, 21240549), (3, 7080183), (9, 2360061), (11, 1930959), (27, 786687), (31, 685179), (33, 643653), (81, 262229), (93, 228393), (99, 214551), (279, 76131), (297, 71517), (341, 62289), (769, 27621), (837, 25377), (891, 23839), (1023, 20763), (2307, 9207), (2511, 8459), (3069, 6921)]