20807217

素因数分解:

$3^2\times {\mathrm{53}}^1\times {\mathrm{181}}^1\times {\mathrm{241}}^1$

素因数の和:481

約数の個数: 24

約数和(自身を含む): 30918888

約数和(自身を除く): 10111671

約数列:

[1, 3, 9, 53, 159, 181, 241, 477, 543, 723, 1629, 2169, 9593, 12773, 28779, 38319, 43621, 86337, 114957, 130863, 392589, 2311913, 6935739, 20807217]

約数ペア:

[(1, 20807217), (3, 6935739), (9, 2311913), (53, 392589), (159, 130863), (181, 114957), (241, 86337), (477, 43621), (543, 38319), (723, 28779), (1629, 12773), (2169, 9593)]