20394927

素因数分解:

$3^2\times 7^2\times {\mathrm{103}}^1\times {\mathrm{449}}^1$

素因数の和:572

約数の個数: 36

約数和(自身を含む): 34678800

約数和(自身を除く): 14283873

約数列:

[1, 3, 7, 9, 21, 49, 63, 103, 147, 309, 441, 449, 721, 927, 1347, 2163, 3143, 4041, 5047, 6489, 9429, 15141, 22001, 28287, 45423, 46247, 66003, 138741, 198009, 323729, 416223, 971187, 2266103, 2913561, 6798309, 20394927]

約数ペア:

[(1, 20394927), (3, 6798309), (7, 2913561), (9, 2266103), (21, 971187), (49, 416223), (63, 323729), (103, 198009), (147, 138741), (309, 66003), (441, 46247), (449, 45423), (721, 28287), (927, 22001), (1347, 15141), (2163, 9429), (3143, 6489), (4041, 5047)]