21906423

素因数分解:

$3^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{257}}^1$

素因数の和:325

約数の個数: 64

約数和(自身を含む): 41610240

約数和(自身を除く): 19703817

約数列:

[1, 3, 7, 9, 11, 21, 27, 33, 41, 63, 77, 99, 123, 189, 231, 257, 287, 297, 369, 451, 693, 771, 861, 1107, 1353, 1799, 2079, 2313, 2583, 2827, 3157, 4059, 5397, 6939, 7749, 8481, 9471, 10537, 12177, 16191, 19789, 25443, 28413, 31611, 48573, 59367, 73759, 76329, 85239, 94833, 115907, 178101, 221277, 284499, 347721, 534303, 663831, 811349, 1043163, 1991493, 2434047, 3129489, 7302141, 21906423]

約数ペア:

[(1, 21906423), (3, 7302141), (7, 3129489), (9, 2434047), (11, 1991493), (21, 1043163), (27, 811349), (33, 663831), (41, 534303), (63, 347721), (77, 284499), (99, 221277), (123, 178101), (189, 115907), (231, 94833), (257, 85239), (287, 76329), (297, 73759), (369, 59367), (451, 48573), (693, 31611), (771, 28413), (861, 25443), (1107, 19789), (1353, 16191), (1799, 12177), (2079, 10537), (2313, 9471), (2583, 8481), (2827, 7749), (3157, 6939), (4059, 5397)]