21903921

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{14401}}^1$

素因数の和:14433

約数の個数: 18

約数和(自身を含む): 34262358

約数和(自身を除く): 12358437

約数列:

[1, 3, 9, 13, 39, 117, 169, 507, 1521, 14401, 43203, 129609, 187213, 561639, 1684917, 2433769, 7301307, 21903921]

約数ペア:

[(1, 21903921), (3, 7301307), (9, 2433769), (13, 1684917), (39, 561639), (117, 187213), (169, 129609), (507, 43203), (1521, 14401)]