21328353

素因数分解:

$3^6\times {\mathrm{17}}^1\times {\mathrm{1721}}^1$

素因数の和:1756

約数の個数: 28

約数和(自身を含む): 33878628

約数和(自身を除く): 12550275

約数列:

[1, 3, 9, 17, 27, 51, 81, 153, 243, 459, 729, 1377, 1721, 4131, 5163, 12393, 15489, 29257, 46467, 87771, 139401, 263313, 418203, 789939, 1254609, 2369817, 7109451, 21328353]

約数ペア:

[(1, 21328353), (3, 7109451), (9, 2369817), (17, 1254609), (27, 789939), (51, 418203), (81, 263313), (153, 139401), (243, 87771), (459, 46467), (729, 29257), (1377, 15489), (1721, 12393), (4131, 5163)]