21297213

素因数分解:

$3^2\times 7^3\times {\mathrm{6899}}^1$

素因数の和:6926

約数の個数: 24

約数和(自身を含む): 35880000

約数和(自身を除く): 14582787

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 343, 441, 1029, 3087, 6899, 20697, 48293, 62091, 144879, 338051, 434637, 1014153, 2366357, 3042459, 7099071, 21297213]

約数ペア:

[(1, 21297213), (3, 7099071), (7, 3042459), (9, 2366357), (21, 1014153), (49, 434637), (63, 338051), (147, 144879), (343, 62091), (441, 48293), (1029, 20697), (3087, 6899)]