21138550

素因数分解:

$2^1\times 5^2\times {\mathrm{419}}^1\times {\mathrm{1009}}^1$

素因数の和:1440

約数の個数: 24

約数和(自身を含む): 39450600

約数和(自身を除く): 18312050

約数列:

[1, 2, 5, 10, 25, 50, 419, 838, 1009, 2018, 2095, 4190, 5045, 10090, 10475, 20950, 25225, 50450, 422771, 845542, 2113855, 4227710, 10569275, 21138550]

約数ペア:

[(1, 21138550), (2, 10569275), (5, 4227710), (10, 2113855), (25, 845542), (50, 422771), (419, 50450), (838, 25225), (1009, 20950), (2018, 10475), (2095, 10090), (4190, 5045)]