21139340

素因数分解:

$2^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{14479}}^1$

素因数の和:14561

約数の個数: 24

約数和(自身を含む): 45003840

約数和(自身を除く): 23864500

約数列:

[1, 2, 4, 5, 10, 20, 73, 146, 292, 365, 730, 1460, 14479, 28958, 57916, 72395, 144790, 289580, 1056967, 2113934, 4227868, 5284835, 10569670, 21139340]

約数ペア:

[(1, 21139340), (2, 10569670), (4, 5284835), (5, 4227868), (10, 2113934), (20, 1056967), (73, 289580), (146, 144790), (292, 72395), (365, 57916), (730, 28958), (1460, 14479)]