21255507

素因数分解:

$3^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{211}}^1$

素因数の和:281

約数の個数: 64

約数和(自身を含む): 39889920

約数和(自身を除く): 18634413

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 41, 63, 91, 117, 123, 189, 211, 273, 287, 351, 369, 533, 633, 819, 861, 1107, 1477, 1599, 1899, 2457, 2583, 2743, 3731, 4431, 4797, 5697, 7749, 8229, 8651, 11193, 13293, 14391, 19201, 24687, 25953, 33579, 39879, 57603, 60557, 74061, 77859, 100737, 112463, 172809, 181671, 233577, 337389, 518427, 545013, 787241, 1012167, 1635039, 2361723, 3036501, 7085169, 21255507]

約数ペア:

[(1, 21255507), (3, 7085169), (7, 3036501), (9, 2361723), (13, 1635039), (21, 1012167), (27, 787241), (39, 545013), (41, 518427), (63, 337389), (91, 233577), (117, 181671), (123, 172809), (189, 112463), (211, 100737), (273, 77859), (287, 74061), (351, 60557), (369, 57603), (533, 39879), (633, 33579), (819, 25953), (861, 24687), (1107, 19201), (1477, 14391), (1599, 13293), (1899, 11193), (2457, 8651), (2583, 8229), (2743, 7749), (3731, 5697), (4431, 4797)]