21520540

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{56633}}^1$

素因数の和:56661

約数の個数: 24

約数和(自身を含む): 47572560

約数和(自身を除く): 26052020

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 56633, 113266, 226532, 283165, 566330, 1076027, 1132660, 2152054, 4304108, 5380135, 10760270, 21520540]

約数ペア:

[(1, 21520540), (2, 10760270), (4, 5380135), (5, 4304108), (10, 2152054), (19, 1132660), (20, 1076027), (38, 566330), (76, 283165), (95, 226532), (190, 113266), (380, 56633)]