20808963

素因数分解:

$3^2\times 7^1\times {\mathrm{557}}^1\times {\mathrm{593}}^1$

素因数の和:1163

約数の個数: 24

約数和(自身を含む): 34471008

約数和(自身を除く): 13662045

約数列:

[1, 3, 7, 9, 21, 63, 557, 593, 1671, 1779, 3899, 4151, 5013, 5337, 11697, 12453, 35091, 37359, 330301, 990903, 2312107, 2972709, 6936321, 20808963]

約数ペア:

[(1, 20808963), (3, 6936321), (7, 2972709), (9, 2312107), (21, 990903), (63, 330301), (557, 37359), (593, 35091), (1671, 12453), (1779, 11697), (3899, 5337), (4151, 5013)]