21394989

素因数分解:

$3^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{251}}^1$

素因数の和:319

約数の個数: 64

約数和(自身を含む): 40642560

約数和(自身を除く): 19247571

約数列:

[1, 3, 7, 9, 11, 21, 27, 33, 41, 63, 77, 99, 123, 189, 231, 251, 287, 297, 369, 451, 693, 753, 861, 1107, 1353, 1757, 2079, 2259, 2583, 2761, 3157, 4059, 5271, 6777, 7749, 8283, 9471, 10291, 12177, 15813, 19327, 24849, 28413, 30873, 47439, 57981, 72037, 74547, 85239, 92619, 113201, 173943, 216111, 277857, 339603, 521829, 648333, 792407, 1018809, 1944999, 2377221, 3056427, 7131663, 21394989]

約数ペア:

[(1, 21394989), (3, 7131663), (7, 3056427), (9, 2377221), (11, 1944999), (21, 1018809), (27, 792407), (33, 648333), (41, 521829), (63, 339603), (77, 277857), (99, 216111), (123, 173943), (189, 113201), (231, 92619), (251, 85239), (287, 74547), (297, 72037), (369, 57981), (451, 47439), (693, 30873), (753, 28413), (861, 24849), (1107, 19327), (1353, 15813), (1757, 12177), (2079, 10291), (2259, 9471), (2583, 8283), (2761, 7749), (3157, 6777), (4059, 5271)]