20781478911

素因数分解:

$3^1\times {\mathrm{971}}^1\times {\mathrm{2143}}^1\times {\mathrm{3329}}^1$

素因数の和:6446

約数の個数: 16

約数和(自身を含む): 27758453760

約数和(自身を除く): 6976974849

約数列:

[1, 3, 971, 2143, 2913, 3329, 6429, 9987, 2080853, 3232459, 6242559, 7134047, 9697377, 21402141, 6927159637, 20781478911]

約数ペア:

[(1, 20781478911), (3, 6927159637), (971, 21402141), (2143, 9697377), (2913, 7134047), (3329, 6242559), (6429, 3232459), (9987, 2080853)]