21380877

素因数分解:

$3^2\times 7^1\times {\mathrm{463}}^1\times {\mathrm{733}}^1$

素因数の和:1209

約数の個数: 24

約数和(自身を含む): 35419904

約数和(自身を除く): 14039027

約数列:

[1, 3, 7, 9, 21, 63, 463, 733, 1389, 2199, 3241, 4167, 5131, 6597, 9723, 15393, 29169, 46179, 339379, 1018137, 2375653, 3054411, 7126959, 21380877]

約数ペア:

[(1, 21380877), (3, 7126959), (7, 3054411), (9, 2375653), (21, 1018137), (63, 339379), (463, 46179), (733, 29169), (1389, 15393), (2199, 9723), (3241, 6597), (4167, 5131)]