20720703

素因数分解:

$3^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{157}}^1$

素因数の和:267

約数の個数: 32

約数和(自身を含む): 30260160

約数和(自身を除く): 9539457

約数列:

[1, 3, 29, 37, 41, 87, 111, 123, 157, 471, 1073, 1189, 1517, 3219, 3567, 4551, 4553, 5809, 6437, 13659, 17427, 19311, 43993, 131979, 168461, 186673, 238169, 505383, 560019, 714507, 6906901, 20720703]

約数ペア:

[(1, 20720703), (3, 6906901), (29, 714507), (37, 560019), (41, 505383), (87, 238169), (111, 186673), (123, 168461), (157, 131979), (471, 43993), (1073, 19311), (1189, 17427), (1517, 13659), (3219, 6437), (3567, 5809), (4551, 4553)]