20681415

素因数分解:

$3^2\times 5^1\times {\mathrm{241}}^1\times {\mathrm{1907}}^1$

素因数の和:2159

約数の個数: 24

約数和(自身を含む): 36015408

約数和(自身を除く): 15333993

約数列:

[1, 3, 5, 9, 15, 45, 241, 723, 1205, 1907, 2169, 3615, 5721, 9535, 10845, 17163, 28605, 85815, 459587, 1378761, 2297935, 4136283, 6893805, 20681415]

約数ペア:

[(1, 20681415), (3, 6893805), (5, 4136283), (9, 2297935), (15, 1378761), (45, 459587), (241, 85815), (723, 28605), (1205, 17163), (1907, 10845), (2169, 9535), (3615, 5721)]