21757617

素因数分解:

$3^2\times 7^2\times {\mathrm{103}}^1\times {\mathrm{479}}^1$

素因数の和:602

約数の個数: 36

約数和(自身を含む): 36990720

約数和(自身を除く): 15233103

約数列:

[1, 3, 7, 9, 21, 49, 63, 103, 147, 309, 441, 479, 721, 927, 1437, 2163, 3353, 4311, 5047, 6489, 10059, 15141, 23471, 30177, 45423, 49337, 70413, 148011, 211239, 345359, 444033, 1036077, 2417513, 3108231, 7252539, 21757617]

約数ペア:

[(1, 21757617), (3, 7252539), (7, 3108231), (9, 2417513), (21, 1036077), (49, 444033), (63, 345359), (103, 211239), (147, 148011), (309, 70413), (441, 49337), (479, 45423), (721, 30177), (927, 23471), (1437, 15141), (2163, 10059), (3353, 6489), (4311, 5047)]