20689767

素因数分解:

$3^2\times 7^1\times {\mathrm{349}}^1\times {\mathrm{941}}^1$

素因数の和:1303

約数の個数: 24

約数和(自身を含む): 34288800

約数和(自身を除く): 13599033

約数列:

[1, 3, 7, 9, 21, 63, 349, 941, 1047, 2443, 2823, 3141, 6587, 7329, 8469, 19761, 21987, 59283, 328409, 985227, 2298863, 2955681, 6896589, 20689767]

約数ペア:

[(1, 20689767), (3, 6896589), (7, 2955681), (9, 2298863), (21, 985227), (63, 328409), (349, 59283), (941, 21987), (1047, 19761), (2443, 8469), (2823, 7329), (3141, 6587)]