21013713

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{7757}}^1$

素因数の和:7813

約数の個数: 24

約数和(自身を含む): 35500608

約数和(自身を除く): 14486895

約数列:

[1, 3, 7, 9, 21, 43, 63, 129, 301, 387, 903, 2709, 7757, 23271, 54299, 69813, 162897, 333551, 488691, 1000653, 2334857, 3001959, 7004571, 21013713]

約数ペア:

[(1, 21013713), (3, 7004571), (7, 3001959), (9, 2334857), (21, 1000653), (43, 488691), (63, 333551), (129, 162897), (301, 69813), (387, 54299), (903, 23271), (2709, 7757)]