21147651

素因数分解:

$3^2\times 7^1\times {\mathrm{103}}^1\times {\mathrm{3259}}^1$

素因数の和:3375

約数の個数: 24

約数和(自身を含む): 35260160

約数和(自身を除く): 14112509

約数列:

[1, 3, 7, 9, 21, 63, 103, 309, 721, 927, 2163, 3259, 6489, 9777, 22813, 29331, 68439, 205317, 335677, 1007031, 2349739, 3021093, 7049217, 21147651]

約数ペア:

[(1, 21147651), (3, 7049217), (7, 3021093), (9, 2349739), (21, 1007031), (63, 335677), (103, 205317), (309, 68439), (721, 29331), (927, 22813), (2163, 9777), (3259, 6489)]