21910905

素因数分解:

$3^4\times 5^1\times {\mathrm{54101}}^1$

素因数の和:54118

約数の個数: 20

約数和(自身を含む): 39278052

約数和(自身を除く): 17367147

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 54101, 162303, 270505, 486909, 811515, 1460727, 2434545, 4382181, 7303635, 21910905]

約数ペア:

[(1, 21910905), (3, 7303635), (5, 4382181), (9, 2434545), (15, 1460727), (27, 811515), (45, 486909), (81, 270505), (135, 162303), (405, 54101)]