20839707

素因数分解:

$3^3\times 7^1\times {\mathrm{71}}^1\times {\mathrm{1553}}^1$

素因数の和:1640

約数の個数: 32

約数和(自身を含む): 35804160

約数和(自身を除く): 14964453

約数列:

[1, 3, 7, 9, 21, 27, 63, 71, 189, 213, 497, 639, 1491, 1553, 1917, 4473, 4659, 10871, 13419, 13977, 32613, 41931, 97839, 110263, 293517, 330789, 771841, 992367, 2315523, 2977101, 6946569, 20839707]

約数ペア:

[(1, 20839707), (3, 6946569), (7, 2977101), (9, 2315523), (21, 992367), (27, 771841), (63, 330789), (71, 293517), (189, 110263), (213, 97839), (497, 41931), (639, 32613), (1491, 13977), (1553, 13419), (1917, 10871), (4473, 4659)]