21280455

素因数分解:

$3^3\times 5^1\times 7^2\times {\mathrm{3217}}^1$

素因数の和:3245

約数の個数: 48

約数和(自身を含む): 44022240

約数和(自身を除く): 22741785

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 49, 63, 105, 135, 147, 189, 245, 315, 441, 735, 945, 1323, 2205, 3217, 6615, 9651, 16085, 22519, 28953, 48255, 67557, 86859, 112595, 144765, 157633, 202671, 337785, 434295, 472899, 608013, 788165, 1013355, 1418697, 2364495, 3040065, 4256091, 7093485, 21280455]

約数ペア:

[(1, 21280455), (3, 7093485), (5, 4256091), (7, 3040065), (9, 2364495), (15, 1418697), (21, 1013355), (27, 788165), (35, 608013), (45, 472899), (49, 434295), (63, 337785), (105, 202671), (135, 157633), (147, 144765), (189, 112595), (245, 86859), (315, 67557), (441, 48255), (735, 28953), (945, 22519), (1323, 16085), (2205, 9651), (3217, 6615)]