8421021

素因数分解:

$3^2\times 7^1\times {\mathrm{349}}^1\times {\mathrm{383}}^1$

素因数の和:745

約数の個数: 24

約数和(自身を含む): 13977600

約数和(自身を除く): 5556579

約数列:

[1, 3, 7, 9, 21, 63, 349, 383, 1047, 1149, 2443, 2681, 3141, 3447, 7329, 8043, 21987, 24129, 133667, 401001, 935669, 1203003, 2807007, 8421021]

約数ペア:

[(1, 8421021), (3, 2807007), (7, 1203003), (9, 935669), (21, 401001), (63, 133667), (349, 24129), (383, 21987), (1047, 8043), (1149, 7329), (2443, 3447), (2681, 3141)]