215985

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{17}}^1$

素因数の和:54

約数の個数: 48

約数和(自身を含む): 459648

約数和(自身を除く): 243663

約数列:

[1, 3, 5, 7, 11, 15, 17, 21, 33, 35, 51, 55, 77, 85, 105, 119, 121, 165, 187, 231, 255, 357, 363, 385, 561, 595, 605, 847, 935, 1155, 1309, 1785, 1815, 2057, 2541, 2805, 3927, 4235, 6171, 6545, 10285, 12705, 14399, 19635, 30855, 43197, 71995, 215985]

約数ペア:

[(1, 215985), (3, 71995), (5, 43197), (7, 30855), (11, 19635), (15, 14399), (17, 12705), (21, 10285), (33, 6545), (35, 6171), (51, 4235), (55, 3927), (77, 2805), (85, 2541), (105, 2057), (119, 1815), (121, 1785), (165, 1309), (187, 1155), (231, 935), (255, 847), (357, 605), (363, 595), (385, 561)]