21725379

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{337}}^1$

素因数の和:404

約数の個数: 48

約数和(自身を含む): 36909600

約数和(自身を除く): 15184221

約数列:

[1, 3, 9, 13, 19, 29, 39, 57, 87, 117, 171, 247, 261, 337, 377, 551, 741, 1011, 1131, 1653, 2223, 3033, 3393, 4381, 4959, 6403, 7163, 9773, 13143, 19209, 21489, 29319, 39429, 57627, 64467, 83239, 87957, 127049, 185687, 249717, 381147, 557061, 749151, 1143441, 1671183, 2413931, 7241793, 21725379]

約数ペア:

[(1, 21725379), (3, 7241793), (9, 2413931), (13, 1671183), (19, 1143441), (29, 749151), (39, 557061), (57, 381147), (87, 249717), (117, 185687), (171, 127049), (247, 87957), (261, 83239), (337, 64467), (377, 57627), (551, 39429), (741, 29319), (1011, 21489), (1131, 19209), (1653, 13143), (2223, 9773), (3033, 7163), (3393, 6403), (4381, 4959)]