21139713

素因数分解:

$3^2\times 7^1\times {\mathrm{307}}^1\times {\mathrm{1093}}^1$

素因数の和:1413

約数の個数: 24

約数和(自身を含む): 35043008

約数和(自身を除く): 13903295

約数列:

[1, 3, 7, 9, 21, 63, 307, 921, 1093, 2149, 2763, 3279, 6447, 7651, 9837, 19341, 22953, 68859, 335551, 1006653, 2348857, 3019959, 7046571, 21139713]

約数ペア:

[(1, 21139713), (3, 7046571), (7, 3019959), (9, 2348857), (21, 1006653), (63, 335551), (307, 68859), (921, 22953), (1093, 19341), (2149, 9837), (2763, 7651), (3279, 6447)]