18754281

素因数分解:

$3^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{449}}^1$

素因数の和:495

約数の個数: 64

約数和(自身を含む): 36288000

約数和(自身を除く): 17533719

約数列:

[1, 3, 7, 9, 13, 17, 21, 27, 39, 51, 63, 91, 117, 119, 153, 189, 221, 273, 351, 357, 449, 459, 663, 819, 1071, 1347, 1547, 1989, 2457, 3143, 3213, 4041, 4641, 5837, 5967, 7633, 9429, 12123, 13923, 17511, 22899, 28287, 40859, 41769, 52533, 53431, 68697, 84861, 99229, 122577, 157599, 160293, 206091, 297687, 367731, 480879, 694603, 893061, 1103193, 1442637, 2083809, 2679183, 6251427, 18754281]

約数ペア:

[(1, 18754281), (3, 6251427), (7, 2679183), (9, 2083809), (13, 1442637), (17, 1103193), (21, 893061), (27, 694603), (39, 480879), (51, 367731), (63, 297687), (91, 206091), (117, 160293), (119, 157599), (153, 122577), (189, 99229), (221, 84861), (273, 68697), (351, 53431), (357, 52533), (449, 41769), (459, 40859), (663, 28287), (819, 22899), (1071, 17511), (1347, 13923), (1547, 12123), (1989, 9429), (2457, 7633), (3143, 5967), (3213, 5837), (4041, 4641)]