21017745

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{967}}^1$

素因数の和:1011

約数の個数: 64

約数和(自身を含む): 44605440

約数和(自身を除く): 23587695

約数列:

[1, 3, 5, 7, 9, 15, 21, 23, 27, 35, 45, 63, 69, 105, 115, 135, 161, 189, 207, 315, 345, 483, 621, 805, 945, 967, 1035, 1449, 2415, 2901, 3105, 4347, 4835, 6769, 7245, 8703, 14505, 20307, 21735, 22241, 26109, 33845, 43515, 60921, 66723, 101535, 111205, 130545, 155687, 182763, 200169, 304605, 333615, 467061, 600507, 778435, 913815, 1000845, 1401183, 2335305, 3002535, 4203549, 7005915, 21017745]

約数ペア:

[(1, 21017745), (3, 7005915), (5, 4203549), (7, 3002535), (9, 2335305), (15, 1401183), (21, 1000845), (23, 913815), (27, 778435), (35, 600507), (45, 467061), (63, 333615), (69, 304605), (105, 200169), (115, 182763), (135, 155687), (161, 130545), (189, 111205), (207, 101535), (315, 66723), (345, 60921), (483, 43515), (621, 33845), (805, 26109), (945, 22241), (967, 21735), (1035, 20307), (1449, 14505), (2415, 8703), (2901, 7245), (3105, 6769), (4347, 4835)]