21048153

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{103}}^1\times {\mathrm{263}}^1$

素因数の和:413

約数の個数: 32

約数和(自身を含む): 33386496

約数和(自身を除く): 12338343

約数列:

[1, 3, 7, 21, 37, 103, 111, 259, 263, 309, 721, 777, 789, 1841, 2163, 3811, 5523, 9731, 11433, 26677, 27089, 29193, 68117, 80031, 81267, 189623, 204351, 568869, 1002293, 3006879, 7016051, 21048153]

約数ペア:

[(1, 21048153), (3, 7016051), (7, 3006879), (21, 1002293), (37, 568869), (103, 204351), (111, 189623), (259, 81267), (263, 80031), (309, 68117), (721, 29193), (777, 27089), (789, 26677), (1841, 11433), (2163, 9731), (3811, 5523)]