21281403

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{113}}^1\times {\mathrm{439}}^1$

素因数の和:579

約数の個数: 32

約数和(自身を含む): 33707520

約数和(自身を除く): 12426117

約数列:

[1, 3, 11, 13, 33, 39, 113, 143, 339, 429, 439, 1243, 1317, 1469, 3729, 4407, 4829, 5707, 14487, 16159, 17121, 48477, 49607, 62777, 148821, 188331, 545677, 644891, 1637031, 1934673, 7093801, 21281403]

約数ペア:

[(1, 21281403), (3, 7093801), (11, 1934673), (13, 1637031), (33, 644891), (39, 545677), (113, 188331), (143, 148821), (339, 62777), (429, 49607), (439, 48477), (1243, 17121), (1317, 16159), (1469, 14487), (3729, 5707), (4407, 4829)]