21029031

素因数分解:

$3^3\times {\mathrm{29}}^1\times {\mathrm{107}}^1\times {\mathrm{251}}^1$

素因数の和:396

約数の個数: 32

約数和(自身を含む): 32659200

約数和(自身を除く): 11630169

約数列:

[1, 3, 9, 27, 29, 87, 107, 251, 261, 321, 753, 783, 963, 2259, 2889, 3103, 6777, 7279, 9309, 21837, 26857, 27927, 65511, 80571, 83781, 196533, 241713, 725139, 778853, 2336559, 7009677, 21029031]

約数ペア:

[(1, 21029031), (3, 7009677), (9, 2336559), (27, 778853), (29, 725139), (87, 241713), (107, 196533), (251, 83781), (261, 80571), (321, 65511), (753, 27927), (783, 26857), (963, 21837), (2259, 9309), (2889, 7279), (3103, 6777)]