21802905

素因数分解:

$3^3\times 5^1\times {\mathrm{161503}}^1$

素因数の和:161517

約数の個数: 16

約数和(自身を含む): 38760960

約数和(自身を除く): 16958055

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 161503, 484509, 807515, 1453527, 2422545, 4360581, 7267635, 21802905]

約数ペア:

[(1, 21802905), (3, 7267635), (5, 4360581), (9, 2422545), (15, 1453527), (27, 807515), (45, 484509), (135, 161503)]