20900565

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{1301}}^1$

素因数の和:1339

約数の個数: 64

約数和(自身を含む): 44997120

約数和(自身を除く): 24096555

約数列:

[1, 3, 5, 7, 9, 15, 17, 21, 27, 35, 45, 51, 63, 85, 105, 119, 135, 153, 189, 255, 315, 357, 459, 595, 765, 945, 1071, 1301, 1785, 2295, 3213, 3903, 5355, 6505, 9107, 11709, 16065, 19515, 22117, 27321, 35127, 45535, 58545, 66351, 81963, 110585, 136605, 154819, 175635, 199053, 245889, 331755, 409815, 464457, 597159, 774095, 995265, 1229445, 1393371, 2322285, 2985795, 4180113, 6966855, 20900565]

約数ペア:

[(1, 20900565), (3, 6966855), (5, 4180113), (7, 2985795), (9, 2322285), (15, 1393371), (17, 1229445), (21, 995265), (27, 774095), (35, 597159), (45, 464457), (51, 409815), (63, 331755), (85, 245889), (105, 199053), (119, 175635), (135, 154819), (153, 136605), (189, 110585), (255, 81963), (315, 66351), (357, 58545), (459, 45535), (595, 35127), (765, 27321), (945, 22117), (1071, 19515), (1301, 16065), (1785, 11709), (2295, 9107), (3213, 6505), (3903, 5355)]