21194901

素因数分解:

$3^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{3697}}^1$

素因数の和:3730

約数の個数: 36

約数和(自身を含む): 38363052

約数和(自身を除く): 17168151

約数列:

[1, 3, 7, 9, 13, 21, 39, 49, 63, 91, 117, 147, 273, 441, 637, 819, 1911, 3697, 5733, 11091, 25879, 33273, 48061, 77637, 144183, 181153, 232911, 336427, 432549, 543459, 1009281, 1630377, 2354989, 3027843, 7064967, 21194901]

約数ペア:

[(1, 21194901), (3, 7064967), (7, 3027843), (9, 2354989), (13, 1630377), (21, 1009281), (39, 543459), (49, 432549), (63, 336427), (91, 232911), (117, 181153), (147, 144183), (273, 77637), (441, 48061), (637, 33273), (819, 25879), (1911, 11091), (3697, 5733)]