21540140

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{13633}}^1$

素因数の和:13721

約数の個数: 24

約数和(自身を含む): 45810240

約数和(自身を除く): 24270100

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 13633, 27266, 54532, 68165, 136330, 272660, 1077007, 2154014, 4308028, 5385035, 10770070, 21540140]

約数ペア:

[(1, 21540140), (2, 10770070), (4, 5385035), (5, 4308028), (10, 2154014), (20, 1077007), (79, 272660), (158, 136330), (316, 68165), (395, 54532), (790, 27266), (1580, 13633)]