21263337

素因数分解:

$3^3\times {\mathrm{19}}^1\times {\mathrm{181}}^1\times {\mathrm{229}}^1$

素因数の和:438

約数の個数: 32

約数和(自身を含む): 33488000

約数和(自身を除く): 12224663

約数列:

[1, 3, 9, 19, 27, 57, 171, 181, 229, 513, 543, 687, 1629, 2061, 3439, 4351, 4887, 6183, 10317, 13053, 30951, 39159, 41449, 92853, 117477, 124347, 373041, 787531, 1119123, 2362593, 7087779, 21263337]

約数ペア:

[(1, 21263337), (3, 7087779), (9, 2362593), (19, 1119123), (27, 787531), (57, 373041), (171, 124347), (181, 117477), (229, 92853), (513, 41449), (543, 39159), (687, 30951), (1629, 13053), (2061, 10317), (3439, 6183), (4351, 4887)]