988778889

素因数分解:

$3^2\times 7^2\times {\mathrm{2242129}}^1$

素因数の和:2242149

約数の個数: 18

約数和(自身を含む): 1661418330

約数和(自身を除く): 672639441

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 2242129, 6726387, 15694903, 20179161, 47084709, 109864321, 141254127, 329592963, 988778889]

約数ペア:

[(1, 988778889), (3, 329592963), (7, 141254127), (9, 109864321), (21, 47084709), (49, 20179161), (63, 15694903), (147, 6726387), (441, 2242129)]