21256767

素因数分解:

$3^2\times 7^1\times {\mathrm{79}}^1\times {\mathrm{4271}}^1$

素因数の和:4363

約数の個数: 24

約数和(自身を含む): 35543040

約数和(自身を除く): 14286273

約数列:

[1, 3, 7, 9, 21, 63, 79, 237, 553, 711, 1659, 4271, 4977, 12813, 29897, 38439, 89691, 269073, 337409, 1012227, 2361863, 3036681, 7085589, 21256767]

約数ペア:

[(1, 21256767), (3, 7085589), (7, 3036681), (9, 2361863), (21, 1012227), (63, 337409), (79, 269073), (237, 89691), (553, 38439), (711, 29897), (1659, 12813), (4271, 4977)]