21662739

素因数分解:

$3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{167}}^1$

素因数の和:280

約数の個数: 48

約数和(自身を含む): 37739520

約数和(自身を除く): 16076781

約数列:

[1, 3, 7, 9, 21, 29, 63, 71, 87, 167, 203, 213, 261, 497, 501, 609, 639, 1169, 1491, 1503, 1827, 2059, 3507, 4473, 4843, 6177, 10521, 11857, 14413, 14529, 18531, 33901, 35571, 43239, 43587, 82999, 101703, 106713, 129717, 248997, 305109, 343853, 746991, 1031559, 2406971, 3094677, 7220913, 21662739]

約数ペア:

[(1, 21662739), (3, 7220913), (7, 3094677), (9, 2406971), (21, 1031559), (29, 746991), (63, 343853), (71, 305109), (87, 248997), (167, 129717), (203, 106713), (213, 101703), (261, 82999), (497, 43587), (501, 43239), (609, 35571), (639, 33901), (1169, 18531), (1491, 14529), (1503, 14413), (1827, 11857), (2059, 10521), (3507, 6177), (4473, 4843)]