21639555

素因数分解:

$3^4\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{449}}^1$

素因数の和:490

約数の個数: 80

約数和(自身を含む): 47044800

約数和(自身を除く): 25405245

約数列:

[1, 3, 5, 7, 9, 15, 17, 21, 27, 35, 45, 51, 63, 81, 85, 105, 119, 135, 153, 189, 255, 315, 357, 405, 449, 459, 567, 595, 765, 945, 1071, 1347, 1377, 1785, 2245, 2295, 2835, 3143, 3213, 4041, 5355, 6735, 6885, 7633, 9429, 9639, 12123, 15715, 16065, 20205, 22899, 28287, 36369, 38165, 47145, 48195, 53431, 60615, 68697, 84861, 114495, 141435, 160293, 181845, 206091, 254583, 267155, 343485, 424305, 480879, 618273, 801465, 1030455, 1272915, 1442637, 2404395, 3091365, 4327911, 7213185, 21639555]

約数ペア:

[(1, 21639555), (3, 7213185), (5, 4327911), (7, 3091365), (9, 2404395), (15, 1442637), (17, 1272915), (21, 1030455), (27, 801465), (35, 618273), (45, 480879), (51, 424305), (63, 343485), (81, 267155), (85, 254583), (105, 206091), (119, 181845), (135, 160293), (153, 141435), (189, 114495), (255, 84861), (315, 68697), (357, 60615), (405, 53431), (449, 48195), (459, 47145), (567, 38165), (595, 36369), (765, 28287), (945, 22899), (1071, 20205), (1347, 16065), (1377, 15715), (1785, 12123), (2245, 9639), (2295, 9429), (2835, 7633), (3143, 6885), (3213, 6735), (4041, 5355)]