20912985

素因数分解:

$3^4\times 5^1\times {\mathrm{51637}}^1$

素因数の和:51654

約数の個数: 20

約数和(自身を含む): 37489188

約数和(自身を除く): 16576203

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 51637, 154911, 258185, 464733, 774555, 1394199, 2323665, 4182597, 6970995, 20912985]

約数ペア:

[(1, 20912985), (3, 6970995), (5, 4182597), (9, 2323665), (15, 1394199), (27, 774555), (45, 464733), (81, 258185), (135, 154911), (405, 51637)]