21378999

素因数分解:

$3^1\times {\mathrm{41}}^1\times {\mathrm{73}}^1\times {\mathrm{2381}}^1$

素因数の和:2498

約数の個数: 16

約数和(自身を含む): 29613024

約数和(自身を除く): 8234025

約数列:

[1, 3, 41, 73, 123, 219, 2381, 2993, 7143, 8979, 97621, 173813, 292863, 521439, 7126333, 21378999]

約数ペア:

[(1, 21378999), (3, 7126333), (41, 521439), (73, 292863), (123, 173813), (219, 97621), (2381, 8979), (2993, 7143)]