20780145

素因数分解:

$3^6\times 5^1\times {\mathrm{5701}}^1$

素因数の和:5724

約数の個数: 28

約数和(自身を含む): 37393716

約数和(自身を除く): 16613571

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 729, 1215, 3645, 5701, 17103, 28505, 51309, 85515, 153927, 256545, 461781, 769635, 1385343, 2308905, 4156029, 6926715, 20780145]

約数ペア:

[(1, 20780145), (3, 6926715), (5, 4156029), (9, 2308905), (15, 1385343), (27, 769635), (45, 461781), (81, 256545), (135, 153927), (243, 85515), (405, 51309), (729, 28505), (1215, 17103), (3645, 5701)]