21268413

素因数分解:

$3^4\times {\mathrm{67}}^1\times {\mathrm{3919}}^1$

素因数の和:3998

約数の個数: 20

約数和(自身を含む): 32253760

約数和(自身を除く): 10985347

約数列:

[1, 3, 9, 27, 67, 81, 201, 603, 1809, 3919, 5427, 11757, 35271, 105813, 262573, 317439, 787719, 2363157, 7089471, 21268413]

約数ペア:

[(1, 21268413), (3, 7089471), (9, 2363157), (27, 787719), (67, 317439), (81, 262573), (201, 105813), (603, 35271), (1809, 11757), (3919, 5427)]