21011859

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{263}}^1\times {\mathrm{269}}^1$

素因数の和:552

約数の個数: 32

約数和(自身を含む): 34214400

約数和(自身を除く): 13202541

約数列:

[1, 3, 9, 11, 27, 33, 99, 263, 269, 297, 789, 807, 2367, 2421, 2893, 2959, 7101, 7263, 8679, 8877, 26037, 26631, 70747, 78111, 79893, 212241, 636723, 778217, 1910169, 2334651, 7003953, 21011859]

約数ペア:

[(1, 21011859), (3, 7003953), (9, 2334651), (11, 1910169), (27, 778217), (33, 636723), (99, 212241), (263, 79893), (269, 78111), (297, 70747), (789, 26631), (807, 26037), (2367, 8877), (2421, 8679), (2893, 7263), (2959, 7101)]