21207303

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{73}}^1\times {\mathrm{191}}^1$

素因数の和:296

約数の個数: 36

約数和(自身を含む): 33800832

約数和(自身を除く): 12593529

約数列:

[1, 3, 9, 13, 39, 73, 117, 169, 191, 219, 507, 573, 657, 949, 1521, 1719, 2483, 2847, 7449, 8541, 12337, 13943, 22347, 32279, 37011, 41829, 96837, 111033, 125487, 181259, 290511, 543777, 1631331, 2356367, 7069101, 21207303]

約数ペア:

[(1, 21207303), (3, 7069101), (9, 2356367), (13, 1631331), (39, 543777), (73, 290511), (117, 181259), (169, 125487), (191, 111033), (219, 96837), (507, 41829), (573, 37011), (657, 32279), (949, 22347), (1521, 13943), (1719, 12337), (2483, 8541), (2847, 7449)]